Children can learn to spell by associating the object with the word and correctly assembling the puzzle pieces. A fun way to improve their recognize letters, spell words and create sentences (Included: 30pcs double-side cards, a set of upper case letters from A-Z, two sets of lowercase letters from a-z, two set of number from 0-9, some math symbol and weather symbol, like sun, rain,snow and so on. All the pieces can be stored in a Iron box.)