Add counting, sorting, colour blending and more fun to your light table with translucent pebbles. Made of eco-friendly FPC material, with each pebble having a unique natural grain. Includes 6 colours in 3 shapes and double-sided activity cards designed in natural colour tones to match the pebbles. Size range: 7cm L x 3cm W (3" L x 1" W) - 4cm L x 4cm W (1-1/2" L x 1-1/2" W).