Stacking and tinkering. This large rainbow-colored stacking tower offers an additional challenge: The differently sized wooden discs must not only be placed on the pole in the correct order, but they also need to be rotated into position so that the cutouts in the discs align with the positions of the small pegs on the pole. It's a tricky task that helps develop fine motor skills and problem-solving abilities. The rounded base allows the completed stacking tower to wobble amusingly as a reward. Playing with stacking towers not only provides children with long-lasting fun but also subtly promotes their understanding of colors, shapes, and sizes.