Plan Toys Twist and Shape Twist the blocks to form different shapes and match them to the grooves on the two sided curved board Tots from 18 months up will delight in making new shapes and matching them Curved base is easy for little hands to hold and flip over, revealing another set of shapes to match Solid wood blocks can be twisted to form new shapes - which side do they match Set includes base made from ecofriendly PlanWood and four wooden blocks in different colors