With these play and stacking cubes, a lot of fun is guaranteed. Each cube offers play opportunities on four sides: letters, numbers, peek-a-boo fun, and a funny action. The blue cube contains a spinning wheel, the red one has a turning wheel with beads, and the yellow one features a clicking wheel. When the child presses the button on top, a funny action is triggered. If they stack all the cubes on top of each other, they can activate all the actions at once with a button press. Meanwhile, the child's fine motor skills and hand-eye coordination are being developed.