With these play and stacking cubes, plenty 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, the 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.