Grimm's 10 piece Counting RainbowThe Grimms 10 Piece Counting Rainbow is a captivating wooden toy that introduces children to the abstract world of numbers through open ended, sensory play. Made from sustainably sourced lime wood and glazed with non toxic water based colours, the ten curved arches encourage children to explore, stack, sort, and discover numerical concepts naturally. Each arch invites independent experimentation, allowing children to learn through hands on experience