Toddler Bed Guide: When to Transition Your Child & How to Choose

The move from cot to toddler bed is one of the first big sleep changes most Australian families navigate. Get the timing right and the transition is smooth; get it wrong and you can end up with months of bedtime resistance. This toddler bed guide covers when to make the move, what to look for in a safe bed, and how to plan the sleep setup from cot through the kids' single and beyond.

Most children move from cot to toddler bed between 2 and 3 years old, when they start climbing out, ask for a "big kid bed," or simply outgrow the cot. A toddler bed is lower, smaller and safer than a single bed — typically used for 2–3 years before the next step up. From around age 5–6, a kids' single bed becomes the right size, often with safety rails for the first year of use.

Key Takeaways

• The cot-to-toddler-bed transition typically happens between 2 and 3 years, guided more by your child's readiness signs than a fixed age.
• Toddler beds are lower and smaller than a single bed, often using a standard cot mattress (92 × 188 cm) with safety rails on the sides.
• A firm mattress is recommended for young children — soft mattresses are unsafe for sleep.
• Most Australian kids move to a single bed (92 × 188 cm) from around age 5–6, with bed rails on for the first 6–12 months.
• Koala's Joey Bed Base is designed for ages 3 and up with adjustable leg height — built to grow with your child from toddler to tween.

This guide walks through transition timing, toddler bed design, safety essentials, product types, and how to plan a child's bedroom that grows with them.

When to Transition from Cot to Toddler Bed

There's no single right age — but according to Raising Children Network, most Australian children move from cot to toddler bed between 2 and 3 years old, with readiness signs mattering more than the calendar.

Common age range. Australia's government-backed parenting service says a child younger than 2 isn't usually emotionally or developmentally ready for a regular bed. The 2–3 year window is where most families land, though every child is different.

Readiness signs to watch for. Parents commonly notice:

• Repeated climbing out of the cot (the biggest safety signal — once they can climb out, the cot becomes a fall risk)
• Asking for a "big bed" or watching siblings' beds with interest
• Outgrowing the cot's length (legs touching the end)
• Needing to get up at night for the toilet during toilet training

Physical milestones. Most children can safely get in and out of a low bed by around age 2. If your child still struggles to climb up or down without help, it's worth waiting another few months.

Sibling arrivals or life changes. If a new baby is coming, Raising Children Network recommends moving your older child either a few months before the baby arrives or once the baby is a couple of months old — not immediately around the birth — so the change doesn't feel like a displacement.

Individual readiness vs. recommended timeline. Some children stay happy in a cot until almost 4. Others are ready at 18 months. The age guidelines are a starting point, not a deadline.

Toddler Bed: What It Is and Why It Matters

A toddler bed is a low, child-sized bed designed to bridge the gap between a cot and a standard single bed. It's typically the same size as a cot mattress (around 92 × 188 cm) but sits much lower to the ground.

Size and construction. Toddler beds are usually the same length and width as a cot — most use a standard cot mattress (92 × 188 cm) — but with an open, low-profile frame rather than enclosed sides. They sit much closer to the floor than a standard single bed.

Safety features. Low height to minimise the impact of any nighttime falls, side rails on one or both sides, and a sturdy frame that won't tip when a toddler climbs in or out.

Transitional psychology. A toddler-sized bed feels less daunting than jumping straight to a "grown-up" single bed. The familiar mattress size from the cot helps, and the lower height means falls don't carry the same risk.

Why not go straight to a single bed. Single beds are higher off the floor, much wider, and harder for a small child to climb into without help. Many parents find a toddler bed (or a single bed with rails) is a gentler intermediate step.

Typical duration. Most children use a toddler bed for 2–3 years before moving to a kids' single bed around age 5 or 6.

Toddler Bed Safety Essentials

Australian product safety for kids' beds is regulated by the ACCC (Australian Competition and Consumer Commission). New mandatory standards for infant sleep products take effect from 19 January 2026 and cover cots, co-sleepers, and cots that convert to toddler beds. When buying, look for products that meet the current Australian Standard.

Low height. A bed close to the floor reduces the risk of injury if your child rolls or falls. Toddler beds are usually built at 20–30 cm off the floor; single beds with the legs at their lowest setting can work similarly.

Guardrails. Side rails prevent rolling out during sleep. They should be securely fixed (not just clipped on) and sit high enough above the mattress to actually stop a falling child — most parents use rails for the first 6–12 months after the transition.

Mattress fit. Per Red Nose Australia, the national safe-sleep authority, the mattress should fit snugly against the frame — Red Nose recommends no more than a 20 mm gap between the mattress and the bed sides. Larger gaps risk a child's head or limb getting trapped.

Mattress firmness. Red Nose is clear: a firm mattress is safer for young children. Soft mattresses increase the risk of suffocation if a small child rolls face-down. Look for a mattress that meets Australian Standard AS/NZS 8811.1:2013 — the official sleep-surface firmness test for infant products.

Bedroom safety beyond the bed. Anchor heavy furniture (dressers, bookshelves) to the wall — toddler tip-overs are a real risk. Keep cords, blinds, and small choking hazards out of reach. Soft toys are fine but keep blankets and pillows minimal for younger toddlers.

Sleep environment. A bedroom temperature of around 18–20°C is comfortable for most kids. A dim nightlight helps with overnight wake-ups; a baby monitor (if you still use one) can sit at toddler-bed height. For more on building a wind-down routine that helps the transition stick, see our sleep hygiene guide. 

Preventing wandering. Many toddlers test boundaries once the cot is gone. A baby gate at the bedroom door keeps them safe without locking them in. Some families also fit a stick-on doorknob cover to slow midnight wanders.

Toddler Bed Product Types

Toddler beds come in several styles, each with different durability, design, and value.

Wooden toddler beds. The most common option. Beech, pine, and ash veneers handle daily kid wear well, look warm in a bedroom, and last long enough to hand down between siblings. Koala's Joey Bed Base uses beech veneer on plywood with FSC® certified timber, designed for ages 3 and up.

Metal toddler beds. Slim, modern, and often more affordable. They can be loud if a child shifts a lot in their sleep — worth testing before buying.

Convertible cots. Some cots convert into toddler beds by removing one side. Good value if you're buying the cot new — but the toddler-bed phase is typically shorter than buying a dedicated toddler bed.

Adjustable-height frames. A growing category. The Joey Bed Base has an adjustable leg height with two settings — 21 cm high or 3 cm low — so the bed grows with your child from early-toddler floor-level to a more grown-up height.

Themed and character beds. Bluey, dinosaurs, race cars — the appeal is high for some kids. Koala's Koala x Bluey Snoozytime Bed Base is a real-world example: built with the same materials as the Joey but with a removable Bluey headboard cover and Bluey-inspired colours (Bluey, Calypso, Flamingo, Walking Leaf). Worth knowing the trade-off — character beds can date faster than neutral designs, but kids love them.

BLUEY (word mark and character logos) are trade marks of Ludo Studio Pty Limited and are used under licence. BLUEY logo © Ludo Studio Pty Limited 2018. Licensed by BBC Studios.

Toddler Bed Mattresses

Picking a toddler bed mattress is at least as important as the bed itself.

Size match. Most toddler beds and dedicated kids' beds use a standard single mattress (92 × 188 cm) — the same dimensions as a cot mattress. Confirm the bed's spec sheet before ordering.

Firmness. The firm is non-negotiable for younger children, per Red Nose's safe-sleep guidance. Plush, soft, or "memory foam pillow-top" mattresses are unsuitable for under-5s.

Hybrid construction. A combination of pocket springs and foam gives firm support with some give for comfort. The Joey Kids Mattress uses this hybrid build — polyurethane foam plus tempered steel pocket springs — and is sized to a standard single (92 × 188 × 15 cm).

Water-resistant cover. Night-time accidents are inevitable during toilet training. A mattress with a water-resistant permanent layer (under the washable cover) saves you from replacing the whole mattress. The Joey Kids Mattress has a polyurethane water-resistant layer plus a zip-off topper made from 100% recycled polyester that machine-washes cold.

Guardrail compatibility. If you're using the Joey Guardrail (sold separately, two can be installed — one each side), the maximum mattress height is 16 cm. Always check the rail-to-mattress clearance before assembly.

When kids outgrow a toddler-sized mattress. When your child is too tall for a 188 cm mattress (typically around age 5–7), the next step up is a King Single (106 × 203 cm). Koala specifically recommends the Koala SE Mattress in King Single for this stage.

Transitioning to a Kids' Single Bed

Around age 5–6, most Australian kids are ready for a single or King Single bed.

Age and readiness. Children at this stage are physically capable of climbing into a higher bed, have settled into "big kid" sleep routines, and often want more space than a toddler bed offers.

Single bed size. The standard Australian single is 92 × 188 cm. King Single (106 × 203 cm) gives kids who are growing fast a bit more length — Koala recommends this size when sizing up from the Joey Kids Mattress.

Bed rails for the first 6–12 months. Removable rails on the new single bed give a safety net during the first year of bigger-bed sleep. Once you've gone six months without a rollout incident, the rails usually come off.

Bunk and loft beds. Useful for shared rooms or smaller bedrooms. The ACCC requires bunk beds to have permanent guardrails on all four sides with at least 260 mm clearance above the mattress on the upper bunk. Kids generally need to be at least 9 years old for the top bunk — younger kids stay on the bottom.

Full single vs. King Single. Standard single fits most rooms; King Single suits taller kids and teens. If you're investing in a bed that needs to last 5+ years, King Single is the longer-lasting bet.

Creating a Child-Friendly Bedroom

A bedroom that grows with a child is one of the easier ways to avoid swapping furniture every few years.

Involve your child. Letting kids help choose bedding, wall colour, or shelf decoration gives them ownership and makes the bedroom feel like theirs.

Colour and décor. Neutral walls + colour through soft furnishings (rugs, throws, art) lets you refresh the room as taste changes without repainting. Bright, washable bedding does most of the visual work.

Storage. Under-bed drawers, low shelves a child can reach, and a clearly labelled toy bin go a long way. Avoid heavy lidded toy boxes — finger-pinch risk.

Mattress and bedding. Beyond the mattress itself, opt for cotton or TENCEL™ Lyocell bedding that's breathable, washable, and tough enough to survive food spills, drawing accidents, and the occasional sick day. Koala's bedding range covers organic cotton, French linen, and TENCEL™ Lyocell sheet sets.

Personalisation without overwhelm. Pick one or two strong personal elements (a feature wall, a Bluey throw, a favourite book corner) and keep the rest neutral. Visual overload makes it harder for kids to settle at bedtime.

For a deeper guide to planning a bedroom that grows with your child, see our bedroom layout guide. 

Beyond Toddler: Pre-Teens and Teens

Eventually the kids' bed gets traded for something closer to an adult bed.

Single to double bed. Most Australian families upgrade to a double (138 × 188 cm) or larger around the early teen years. Kids who've grown tall fast might jump straight to a Queen.

Desk and study integration. From around 7–8, a small desk in the bedroom becomes useful. Aim for adjustable-height chairs and good task lighting — homework time only gets longer from here.

Independence in design. Older kids and teens want a say in furniture, colour, and posters. The earlier you let them lead, the less negotiation you'll have during the teen years.

Durability for the long stretch. A quality bed bought at age 8 can last well into the late teens. Solid timber frames, sturdy slat systems, and a mattress with a long warranty pay off here.

Future-proofing. Look at how easily furniture moves between rooms (in case you rearrange) and whether bed frames accept multiple mattress sizes (in case you upgrade the mattress later).

Ready for the next toddler bed?

Koala's Joey Bed Base is designed for ages 3 and up with an adjustable leg height that grows with your child from toddler to tween. Paired with the water-resistant Joey Kids Mattress and an optional Joey Guardrail, it's a complete kids' sleep setup — FSC® certified timber, 120 day trial, and a 5-year warranty.

Shop Koala's kids' range →