Explore color, shape and pattern! Each durable sorting stone measures 1.5″ and has a colorful bug character engraved on one side. Each set includes 20 sorting stones, with five bug body shapes – circle, square, rectangle, triangle and hexagon – in four colors – red, blue, yellow and green. Great for indoor and outdoor play. A leaflet with additional activities is provided with ideas on how to introduce the stones to your setting, plus games exploring sorting, counting and pattern skills.