Stackable cubes in fine colors. In wood. Can be stacked on each other or inside each other. Can be sorted in order from smallest to largest and vice versa. Encourages logical thinking, exercises motor skills, coordination and can keep the child busy for several hours. Suitable for children of all ages. The smallest loves to pick in and out the cubes. Older kids can use them as houses for their toy animals or as storage boxes, the variations are endless. Each cube has a hole, that, when stacked inside each other forms a hole through them all.