AlphaMagnets and MathMagnets are shaped accurately with correct proportions, and are made with strong magnets for a 'sure stick.' Alphabet assortments come with more of the letters you need most (extra vowels a, e, i, o, u, and consonants b, l, m, r, s, and t), and include punctuation marks. Number sets include math symbols. Color-coded sets help teach differentiation with red vowels, blue consonants, red math symbols, and blue numbers (214 pieces, 1-1/2-inch tall). Comes in a durable, stackable tub with brightly colored plastic lid for convenient self-storage. WARNING: CHOKING HAZARD - Small parts. Not for children under 3 yrs.