The 15 appealing counting stones in this set display irregular number arrays from 1 to 5, using three different patterns of indented circles to represent each number. The tactile nature of the stones means they are perfect for sensory maths investigations and can be used outdoors, including in water, sand and mud. They will help children with counting, number recognition, subitising, number bonds, and learning that numbers can be represented in a range of ways. Contains 15 stones in three shades, measuring approx 55mm. Safe for age 2+.