These stacking stones are so much fun! Learners can stack them horizontally according to size or carefully balance them vertically on one another. The stones offer opportunities to practise colour recognition, ordering by size, balancing, hand eye coordination and motor skills and also help learners to discover gravity. These open ended wooden stones are made by QToys and are perfect for learners aged 3 and above. The largest stone measures approximately 18 x 18 x 1.8cm and the smallest approximately 6 x 6 x 1.8cm.