Travel cot for 21 month old?

[ladymoo]

21 mo ds is staying away for one night & needs a travel cot but having looked online i'm not sure if they are big enough for him now? Any tips???

What about the little Ready Beds? You can get them from Argos and places like that (sorry would link but not very good at them). They're a little blow up bed and they roll up into a little bag.