12 months & up. Introduce your children to an exciting activity with these wonderful Colorful ABC Nesting Blocks with Different Textures. These engaging blocks introduce size, shape, and all 26 letters of the alphabet. Each panel contains different letters and textures. Children can stack them, nest them inside one another, or reverse the cube for another design and texture. Encourage your children to go over the alphabet as they play. Colors and fabrics may vary.