Good for protective behaviours exercise wit kids.A hand with a heart (translate) Lemay Lemay De Groof. This would make a great candy dish for grandparents (with the kids' hand prints) if you mod-podged it.
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?