Object permanence is one of the most important concepts your child learns in the first year of life. the box is divided into 2 compartments with a sliding top. the cotton ball can be inserted through the hole on both sides, but only by sliding the yellow cover to the opposite side. it is made of birch plywood and cotton ball. it is coated with water-based paint, which is harmless to health en 71-3 certified. it has no sharp edges, it is safe for children. box size: 25x9x9cmcotton ball: 4.5 cm do not leave your child alone while playing with the toy. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.