A square wooden board with 4 small pegs that holds 4 balls of two different sizes. The balls invite the child to grasp and to discover the differing sizes. Placing the balls on the pegs is another new challenge for the infant. As the pegs seem to ‘disappear’ in the balls, the child experiences that the center hole in the ball disappears too, and the shape becomes whole.
A square wooden board with 4 pegs that holds 4 ellipsoids of the same sizes. Placing the ellipsoids on the pegs is a challenging task for the infant. As the pegs seem to "disappear" in the ellipsoids, the child experiences that the center hole in the ellipsoid disappears too, and the shape becomes whole.