12 months & up. With two buckets to fill with blocks, this scale introduces toddlers to weight, gravity, and balance. Each of the six colorful shapes are equal weight. When the weight is balanced, the eyes open. The eyes close when the scale is off balance and open when equally balanced. Kids will delight in watching the eyes open and close as they move the shapes in and out of the buckets. For added enjoyment, there is a mirror on the reverse side.