You replace their shoes when they grow out of them.
You upgrade their car seat as they get bigger.
But their mattress?
The thing they spend 10–12 hours on every night?
Most parents don’t think about it… until something goes wrong.
Here’s the reality
The average Australian family replaces a child’s mattress every 8–10 years.
Sleep experts recommend:
- Every 5–7 years
- Or sooner during major growth phases
Why this matters
Bad sleep in kids doesn’t look like bad sleep in adults.
It shows up as:
- Crankiness
- Trouble focusing at school
- Restless nights
- Unexplained aches and pains
Sound familiar?
Their mattress might be the culprit.
5 Signs Your Child Needs a New Mattress
1. They wake up tired — every morning
One bad night happens.
But waking up tired every day is a pattern.
If they’re getting enough hours but still dragging themselves out of bed, their mattress may not be giving them deep, restorative sleep.
2. You can see sags or lumps
Run your hand across the surface.
Feel dips or bumps?
That’s the mattress breaking down where their body rests night after night.
Uneven mattress = uneven support
Uneven support = problems for growing spines
3. They complain of back or neck pain
Kids shouldn’t have back pain.
If they’re waking up stiff or sore, don’t ignore it.
Growing bodies need proper spinal support—and an old mattress simply can’t provide it.
4. They’ve had a growth spurt
A mattress that worked at age 6 won’t always work at 10.
Kids can grow 10–15cm in a short time.
Their mattress needs to keep up.
5. It’s over 7 years old
Even if it looks fine, the inside tells a different story.
Foam softens. Springs weaken.
After 7 years of nightly use, most mattresses have lost a significant portion of their support.
So… how often should you replace it?
There’s no one-size-fits-all answer—but here’s a simple guide:
-
Toddler → Age 5
Replace when moving to a bigger bed or if showing wear -
Age 5–10
Reassess every ~5 years (earlier after growth spurts) -
Age 10–15
Higher weight = faster wear
Reassess every 4–5 years -
Teenagers
Time to move to a proper adult mattress
What to Look for in a Kids Mattress
Support over softness
Soft feels nice.
Support is what growing bodies actually need.
Look for a medium-firm mattress.
Durability
Kids aren’t gentle.
Jumping, rolling, spills.
Pocket springs tend to last longer than all-foam for heavier use.
A mattress protector (non-negotiable)
- Extends mattress life
- Protects from spills and accidents
- Saves money long-term
Buy for where they’re going
Not where they are now.
A king single gives room to grow and avoids upgrading too soon.
The Bottom Line
Sleep is when your child’s body:
- Repairs
- Grows
- Processes everything from the day
A worn-out mattress quietly works against all of that.
The good news
You don’t need to spend a fortune.
A quality mattress in the $400–$900 range will give most kids everything they need.
And when it’s delivered in a box, the whole process—from order to bedtime—takes less than an hour.
Not sure where to start?
Take our 2-minute mattress quiz and we’ll point you in the right direction—no showroom required.
Shop Kids Mattresses
naptime.com.au/collections/kids
