I agree, aerobeds are nice and better than just using a sleeping bag. However, if you're flying, like we usually do, you might want to think about an ultralight sleeping pad (
https://www.amazon.com/s/ref=nb_sb_noss_1?url=search-alias=aps&field-keywords=ultralight+sleeping+pad&rh=i:aps,k:ultralight+sleeping+pad). They're really compact when folded up compared to an aerobed or sleeping bag. It's comfortable enough even for adults, so would be fine for a 10 year old. Unless you're flying southwest, you have to pay for luggage, so we try to minimize everything we bring.