Black glue / watercolor art - mix a few blobs black acrylic craft paint into a bottle of Elmer's Glue-All white school glue - draw with glue on water color paper, let dry 1 day - color with water colors
Love this minus the cat! Get the kids to paint background with watery paint and scrunch paper. Carefully uncrumple and lay to dry. When dry have them draw a tree branch with a black sharpie and glue on a black cat made out of paper.