Hair dress from balloons
This is what we have made with the small balloons for water bombs. These remained unused. (One of the greatest things that my kids found at the playgrounds in New York are those special places with water sprinkling from everywhere. Kids need so little to be happy and all wet.)
Apart from the hair dresses the kids made pictures on the wall, too.
I know that one has to rub the balloons on a cloth, but the kids found out that its enough to rub them on the wall, and they stay there 5-6 minutes. May be because they are small and light, or because there is some magic in the latex, who knows 🙂