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?
Woven paper craft is a nice way to recycle old newspaper and magazines. Sometimes it can be turned into some useful household stuffs, such as a storage box -- wonder if can make one large enough for kitty bed .