Exploring lines: using hand drawn lines on rocks for play. Challenging pre-writers to distinguish between straight and curved lines to help build their understanding of shape and help establish correct letter and number formation later. - My DIY Tips
Writer of The Big-A Book of Crafts (and The Big-A Book of Crafts Mark Montano discusses the pleasure of rock painting in ROCK MY WORLD! (Montano gives attributions and credits to ALL of his photo sources.