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Your 18 – 21 month old – toddler development guide

Toddler crawling up stairsNot content with walking around the house your little one is probably starting to climb all over it too. All your low furniture will be just another mountain for her to tackle and once she starts climbing the stairs she’ll never want to stop!

By the time your little one is 18 months old they will probably be walking quite well, but don’t pack away the Band-Aids just yet – there will still be a lot of accidents as he tries to run faster and climb higher. Don’t take your eyes of him for a second.

Your toddler may also be starting to string a few words together and will understand simple directions like ‘go get your cup’.

You might have to read up on ways to improve toddler behaviour as tantrums might become more frequent at this age.


At this age your baby has probably dropped a day sleep – so down to just one nap a day.

They will still need between 10-12 hours of sleep at night and although they might sleep through till morning the challenge will be getting them to sleep in the first place. Toddlers may not want to miss out on all the excitement and may start to resist bedtime. Oh, and be careful not to leave items in their cot as they will probably pile them up and use them to escape!

More useful links:


Please note: All children are different, these are generic guides and aren’t a substitute for professional medical advice. If you have any concerns, don’t hesitate to contact your health care provider.


NEXT: Toddler Development Guide: 21 months to 2 years

BACK: Toddler Development Guide: 15 – 18 months

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