AlphaMagnets and MathMagnets are shaped accurately with correct proportions, and are made with strong magnets for a 'sure stick.' Jumbo pieces are 2-1/2-inch tall for handling ease and tactile feedback for young children learning basic skills (100 red, blue, green, yellow, orange and magenta pieces). 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. 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.