2 years & up. Invite children to build thoughtfully and organically with Wood Stackers Standing Stones. Inspired by prehistoric building blocks, these geometric, wooden stones foster a child’s curiosity for creating ancient structures using organic, natural materials. Each wooden block is sanded smooth to highlight the beautiful gradient of the original wood. Different sizes help children understand weight, gravity and patterns. Inspiration cards encourage children to creatively stack and build using the natural blocks to create familiar objects. Set of 20.