Strange Habits

Aiden has the strangest habit at bedtime. As we read [what feels like] 300 books, when we are finished, Aiden will shove them under his blankets. When I go into his room in the morning and get him up for school, there are books, toys and anything else he can find in bed with him. I think it's funny. I don't know why on earth he does it though. Maybe he just doesn't want to be alone and his things make him feel comforted?