12 months & up. With two buckets to fill with colorful blocks, this scale introduces toddlers to weight, gravity, balance, and critical thinking. Each of the six colorful shapes are equal weights. When the weight balances, the eyes open. The eyes close when the scale is off balance. 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.