There is no reason why a child over the age of four shouldn’t sleep in a queen size bed. Although it’s not typical, if the bedroom is large enough to accommodate a queen mattress and furniture, then the bed will give your child plenty of space to stretch out and move around. A queen mattress will also be more comfortable if now and then your little one needs you lying by his or her side to fall asleep after a nasty dream. It is also more spacious for you to comfortably read a good-night story and allows room for bed mates such stuffed animals and the family dog or cat.