Collision Course, Bold colorful decorative fine art ocean waves rainbow colors crimson red green royal blue urban building bricks abstract painting, vibrant whimsical iphone 4 iphone 5 cell phone case, hard plastic phone cover, by Ebi Emporium
Watercolour triangles let students paint paper with watercolors, wet on wet, similar colors. Let dry and cut into triangles. Students pick triangles and glue down randomly, leaving white around each one. Maybe try with black or other color background?