Painting with Watercolors, Glue and Salt. Kids will love being creative and making designs with the glue. The salt creates a pretty starburst effect by soaking up paint pigments as the painting dries. And as an extra bonus: the salt sparkles!
Elmer's Glue on Canvas, then paint the whole thing. I have totally done this, but with a hot glue gun. Elmer's Glue seems to be a better idea since hot glue leaves behind strings and is harder to work with.