2 years & up. Promote block play with this set of 40 smooth hardwood blocks inset with colorful, transparent acrylic windows. Sized right for little hands, these durable blocks feature 6 different shapes, 4 different colors, and are ideal for color exploration, early construction, and shape recognition. Encourage children to come up with their own unique designs. Have children build a structure at the window and watch as the colors are cast on the walls. This set includes 40 assorted shapes.