Cast from a resin and stone mix, they are durable for use in sand, water and small-world play. Each pebble is engraved and measures between 3-4.5cm. Number set includes two of numbers 0-10 (22 pebbles). Sum building set contains both number and operation pebbles, a playful way for children to explore sums. Includes two each of numbers 0 - 20, +, -, = and one each of x and ÷.For ages 3yrs+.
I love building the sums or even just practise numbers with the younger children
Lot of money for what you get
As we live near the beach these appealed to most of the children and can be used in many ways.