These versatile Pattern Play blocks are a great introduction to math concepts like sorting, matching, symmetry, congruence and fractions. This high-quality set fits just-so into its wood tray, with vibrant colors and unusual shapes that build spatial skills. Comes with 40 exceptionally well-finished wood blocks and 40 pattern cards. Ages 3 and up. Measures 11.6 x 11.6 x 1.7 in.