Interlocking Cube Stair 1-10

This stair is a solid plastic tray with ten grooves for use with the Interlocking Cubes (sold separately). The cubes are placed in each groove and demonstrate the numbers one through ten as groupings of ones, which teaches and reinforces number, ordering and sequencing. The tray measures 23 cm x 22 cm (about 9" x 8 1/2") and is made of durable plastic.