Little Reader Blocks are 3? cubes constructed of sturdy corrugated cardboard.   The little reader kids blocks are imprinted with over 100 preK-2 sight words that combine learning with play. Words are color-coded by type (adjective, noun, verb, etc.) to make sentence forming fun and easy for children.  Each set includes 18 blocks including:  3 yellow adjective blocks , 3 green noun blocks , 5 blue verb blocks , 5 red pronoun blocks , 2 white preposition blocks    Kids can roll blocks like dice to form sentences, look for familiar letters or words, stack blocks to make sentences, and much more . Guided play activities are included  Kids Block Play Toys-18pc Block Set - Reader are 100% made in the USA!