Yellow Door's number stones turn math practice into a delightful outdoor activity. This set includes 20 pieces that help children explore sequences, odd and even numbers, and addition or subtraction, including number bonds to 10. Crafted from durable stone and resin, these pieces are built to last through many hours of play.
Yellow Door's number stones turn math practice into a delightful outdoor activity. This set includes 20 pieces that help children explore sequences, odd and even numbers, and addition or subtraction, including number bonds to 10. Crafted from durable stone and resin, these pieces are built to last through many hours of play.
