The wooden Geo Trio sorting and stacking toy helps children learn colors, shapes, sizes, coordination and promotes their creativity. The 12 pieces (3 green traingles, 3 blue squares, 3 red circles, and 3 faces) can be stacked and sorted as the child wishes. Recommended for children 18 months and older. Measures8.5 x 4.5 x 3.5 inches.