Painting rocks rocks! For more:

could be lovely preschool activity, to make some painted rock pictures

DIY 'pebble people'. There is a store with that name in Solvang, California - selling these pebble decorations and other handcraft - I visited it back in the 70ies.

We have one of these and someone put a piece of a popsicle stick and wrote "Rock Concert" - Love Rock Art.Garden Trinkets - Awesome Ideas, Projects and Tutorials! Including, from 'instructables', this creative 'garden thing' project with rocks.

vintage pet rocks!

vintage pet rock gathering - mine had the words "rock concert" painted on it…