12 months & up. These colorful Nest and Stack Shapes are perfect for teaching children color and shape recognition. With these exciting toys, children will develop fine motor skills, coordination, counting skills, spatial abilities, and problem-solving skills. Watch as children nest, stack, or sort all while learning important math concepts. Encourage children to identify shapes and colors as they stack the blocks into their self-correcting spaces. Shapes come in hues of red, blue, green, and purple.