Animal Track Rubbing Plates are versatile & fun for art, design, science, geography & much more. This hands-on, easy-to-use tool is sure to enhance learning concepts. Add texture to artwork by placing paper over a plate & rubbing with a crayon, marker or pencil to make the design emerge. Layer designs for more effects. Fill with or press into modeling clay. Sturdy plastic rubbing plates work great with paper mache. Make sun catchers using white glue & food coloring. Simply fill tray & let dry. Peel the resulting mold off, & you're done. Each set includes 16 rubbing plates & a guide with craft ideas. They are recommended for children ages 3 & over.