3 years & up. A rainbow assortment of 6 different colors and 6 different shapes make up this set of plastic translucent building blocks. These colorful Transparent Light and Color Blocks area great way to promote creativity. They also make a perfect accessory for a light table. Encourage children to get creative and build a unique block structure. For further learning encourage children to identify the colors and shapes of the blocks they are using. Largest block measures 3 15/16" x 1 5/16". 108 piece set.