Plan Toys Lucas Tower is designed to intellectually stimulate your thriving toddler, while improving fine motor and coordination development! Lucas Tower consists of three roads and five disks - each different in color and size and able to slide onto any of the rods. The stacking game begins with the disks neatly stacked in order of size on one rod, with the smallest at the top. Your little one must individually move each disk to another rod, and a larger disk cannot be placed on top of a smaller one. Let the game begin!