Got an old canvas print you're tired of? Glue some stuff onto it -- buttons, broken jewelry, shells, fabric flowers -- look around your house. Another idea to steal -- button letters on fabric panels - so many possibilities!
popping paint filled balloons on a canvas . put paint tape to cover the place to stencil, put paint filled balloons around canvas, pop with darts (slingshots?), let dry, use stencil to add silhouette - love it! Or do the crayon melting thing!