This Sum-Building Set contains both number and operation pebbles, creating a playful way to introduce children to sums. It includes two of numbers 0-20, +, -, = and one each of x and .

About Learning Pebbles

Appealing to children’s natural instincts to sort and collect, these tactile pebbles can be used in sand, water and small world play. Cast from a unique mix including real stone, they are durable and waterproof, so they are ideal for use outdoors.