Sum Building Set

Encourage a fascination for numbers with our fabulous number pebbles. These popular tactile objects appeal to children’s instinct to explore, investigate, sort and collect.

Each pebble is cast from a special stone and resin mix and engraved with a number (30–45mm). These durable, weatherproof pebbles are ideal for use in sand, water and outdoors, and will not fade over time. 

• Contains: two of each of the numbers 0–20, two of operations +, – and =, one of operations x and ÷
• Contains 50 pebbles
• Safe for 2 years +