Aren't kids creations wonderful, I would have never thought of doing this! This is an absolute plus for child initiated learning, however I would defiantly recommend this for an adult initiated/ led activity. All you need is a ray of sunshine and some of these rainbow blocks, build them up and watch the wonderful patterns projected onto the ground!! A great outdoor activity for a sunny day.
"The work will wait while you show the child the rainbow, but the rainbow won't wait while you do the work." Patricia Clafford