Stacking and shaping fun with an arctic atmosphere! This stacking tower made of FSC® 100%-certified wood motivates even the youngest children to sort the six different colored rings by size and stack them on top of each other. This activity trains motor skills and hand-eye coordination and provides insight into colors and sizes. The rounded base allows the stacking tower to rock back and forth, challenging children's agility in a fun way. A movable pin provides extra safety.