Kids bags should be synthetic, not down. I had an old synthetic half-bag left over from my climbing days (these bags are called an elephant's foot). Even at 5-6 years old accidents do happen so having the bag washable and quick drying was great. I also used this bag when my kids were still in diapers. If you sew, it is quite easy to make a kids bag. My kids never would put their heads in a hooded bag and cinch it up, so I just had a basic rectangle, narrowing at the foot and a 1/2 zipper and drawstring top. The older kids would sleep in balaclava hats and thier jackets when it was cold. The toddlers slept in their footed pj's and balaclava . A balaclava is better than a hood because they can move thier heads independently from their shoulders and not end up with restricted breathing space. Whatever you get, try it out in the backyard first.