2 years & up. Arch and Tunnel block set adds a new dimension to your block play experiences. Learn to balance the pieces in just the right way and add curvature to your block buildings for a variety in structure. Each arch is made of birch wood. Set includes two large tunnels and eight smaller arches. Measures: Tunnel: 11"W x 11"D x 5.5"H, Arch: 11"W x 3"D x 5.5"H. 10 pieces.
