It was bubble day at school. These are pretty simple to make. A clear plastic cup, a piece of a terrycloth towel, a rubber band to hold it tight, a straw, and some baby shampoo. You put the shampoo on top of the towel and then use a spray bottle with water to get it really wet. There should not be any water in the actual cup (hence the reason for it being clear). Then blow. The kids had a blast and since it's baby shampoo it wasn't very messy.