Wooden Geo Board-mathematical Manipulative Array Block With Pattern Cards. Feature: Easy to Use: There is a Rounded Nail on the Back, and the Small Top and Long Nails on the Back Allow the Little Finger to Easily Grab and Stay on It. Really Broaden the Scope of Their Shape. Traditional Teaching Toy: This is a Montessori Traditional Teaching Toy. It is Recommended to Be 18 Months or Older. It Can Increase Your Child’s Imagination and Coordination, Improve Eye-hand Coordination, Color and Shape Recognition. Wide Application: Contains 20 Pictures 36 Rubber Bands (4 Colors) with Your Imagination, Put a Variety of Shapes on the 8x8 Geo Board, Such As Triangle / Square / Animal / Number / Letter, Etc. Easy to Combine and Easy to Split, Very Suitable for Families and Schools. Sturdy and Durable: All Boards Feel Very Strong and Durable and Support Well when Played with Them. The Band is Also Very Powerful and Will Not Be Easily Broken. (Adult Guidance is Needed for Children Aged 1 to 3)