Plastiquem: PLOU I TOTS ANEM AMB PARAIGÜES. Crayon and watercolor umbrella drawings. Crayon resist with blue water correct over white crayon. Or cool colors over white crayon and make the umbrella warm colors only.
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!