From Cot to Big Bed: When to Move Your Toddler and How to Settle Them In

It starts with one chubby leg. You peek through the door at nap time and there it is, hooked over the top of the cot rail, toes wiggling, while your toddler grins at you like they have just discovered fire.

Cue the sudden panic: is it time for a big bed? Is it too soon? And what if they never stay in it?

Deep breath. Moving from cot to bed is one of those milestones that feels enormous beforehand and fairly ordinary a month later. Here is how to plan it, step by step, so the whole house keeps getting some sleep.

Before the Move: Is Your Toddler Actually Ready?

There is no magic birthday for this. Most toddlers make the switch somewhere between 18 months and three years, and plenty of happy sleepers stay in the cot right up to the top of that range.

Signs it might be time:

• Climbing out, or seriously trying to. This is the big one. A fall from cot height is a bigger worry than a roll out of a low bed.
• They have run out of room. Head and feet touching both ends, or bumping the bars every time they turn over.
• A new baby needs the cot. Totally fair, but see the timing tip below.
• They are asking for it. Some toddlers spot a cousin's bed and simply want one. Lucky you!

Signs it can wait: they sleep well, they are not climbing, and they seem content. If the cot is working, there is no prize for moving early. Lots of parents on Mumsnet say their one regret was switching before their child could understand "stay in bed".

The timing tip nobody regrets

Try not to stack big changes on top of each other. Starting nursery, potty training, a house move, a new sibling arriving? Pick a calm patch instead.

If the cot is needed for a new baby, make the switch at least a couple of months before the due date, or keep the baby in a bedside crib for longer. That way your toddler does not feel their bed was handed over to the newcomer. 💛

Setting Up: Making the Room Bed-Ready

Here is the mindset shift. In a cot, the cot is the safe space. In a big bed, the whole bedroom becomes the safe space, because your toddler can now get up and wander at will.

Before night one, get down on your knees and look at the room from toddler height:

• Anchor wardrobes, drawers and bookcases to the wall
• Move blind and curtain cords well out of reach, or tie them up with cleats
• Cover plug sockets you are not using and tuck cables away
• Pop a stair gate on the bedroom door or at the top of the stairs
• Check nothing climbable sits under the window

The bed itself

If you have a cot bed, you are in luck. Most simply drop a side and convert into a junior bed, so it is the same mattress and the same smell, just with an open side. Familiar is good.

If you are buying a separate bed, keep it low to the floor for the first year or so. A bed rail along the open side helps with the "rolled out in my sleep" bumps, especially for wriggly sleepers.

A bed rail is about stopping accidental rolls, not about keeping a determined toddler in. They will happily climb over the end anyway, and that is fine, it means they can get out safely on their own.

Bedding-wise, a fitted waterproof sheet earns its place, particularly if potty training is anywhere on the horizon. Having two in rotation means no midnight laundry emergencies.

And here is a little secret: you do not need to bring in a duvet straight away. Many toddlers kick covers off all night, so sticking with their usual sleeping bag keeps them cosy and keeps one thing exactly the same. Choose a size that gives their legs room to climb in and out of bed. Many brands make larger sizes for toddlers, and some have zip-off sleeves for warmer nights.

The First Night: Keep It Boring (In a Good Way)

Get your toddler excited in the daytime and keep bedtime itself completely predictable.

A few ideas that tend to work:

• Let them help. Choosing a pillowcase or carrying their favourite teddy over to the new bed gives them a sense of ownership.
• Practise at nap time first. Some families start with daytime naps in the new bed for a week before doing nights.
• Read a big-bed story. Lots of picture books cover this exact moment, and toddlers love seeing their own life in a book.
• Keep the routine identical. Same bath, same songs, same order. The bed is the only new thing.

Expect a burst of novelty. Your toddler may bounce, giggle, get out three times to show you they can, and then fall asleep sideways with their feet on the pillow. All normal.

The First Few Weeks: When the Novelty Wears Off

This is where many parents get caught out. The first few nights are often brilliant. Then, around week two, your toddler realises the door is not locked and the fun begins.

Cue the "one more drink", the 5am visit and the small figure appearing at the top of the stairs during your telly time. Sound familiar?

The quiet return

The most common approach is simple and a bit boring, which is exactly why it works. Each time they get up, walk them back to bed calmly, with as few words as possible. No chats, no cuddles on the sofa, no big reaction. Just "it's sleep time" and back they go.

It might take 20 returns on night one. It usually takes far fewer by night four. Consistency beats cleverness here.

Early wake-ups and the "is it morning yet?" problem

Toddlers cannot tell the time, so a dark winter morning at 5am looks exactly like 7am to them. A toddler clock or sleep trainer that changes colour when it is okay to get up gives them something concrete to watch for.

Start with a wake-up time that is close to when they naturally wake, then nudge it later by ten minutes every few days. Lots of praise when they wait for the light, even if they only managed it once. A small sticker chart can work wonders too. 🌟

A Month In: When to Rethink

Most toddlers settle into a big bed within a few weeks. If you are a month in and every night is still a battle, it is okay to pause and reassess.

• Is something else going on, like teething, illness or a big change at nursery?
• Has the routine drifted later or got longer?
• Are they dropping their nap, and overtired by bedtime?

If they are under two and the cot is still in one piece, some families simply go back to it for a few months and try again later. That is not failure, it is good timing.

And if sleep has gone badly wrong for weeks, or you are worried about how your toddler is sleeping or breathing at night, have a chat with your health visitor or GP. That is exactly what they are there for.

One Last Thing

The day you take the cot apart might feel a little bittersweet. It is the end of the baby bit, really. Take a photo of them in it one last time, then watch them sprawl like a starfish in their new grown-up bed.

If you are planning the big switch, or a new arrival is pushing it along, pop the bits you need onto your BubsNest wishlist so family know exactly what will help.