Rainbow Felted Rocks

'Twig and Toadstool' have no lack of Waldorf goodies, particularly felt treats. These Rainbow Rocks are no exception. http://twigandtoadstool.blogspot.ca/2012/06/felted-rainbow-rocks.html

Collect smooth river stones in several sizes then wash them well with soap and water.
Wrap with roving wool, squirt with liquid dish detergent and agitate to the point of felting, by rubbing and rolling in your palms.

Not only are they a pretty addition to a Nature Table, but a useful resource for size comparison and counting.