When my boys were little, one of their favorite things to do at Christmas was to sword fight using the cardboard tubes from the inside of the wrapping paper, and as they got older they continued this every year. I don't really wrap anymore, I use gift bags. So today I realized I didn't have any swords for their traditional competition and was calling friends trying to find some empty cardboard rolls and they were going through their recycling bins to help me. Ta da. Christmas is saved.
Do your kids do this?