Teach basic size, shape, and position concepts through teacher directed play. As children imitate the teacher in sorting, stacking, rubbing and moving the pieces, they develop visual discrimination, language and fine motor skills as well as general school/social behavior. With basic concepts in place, children easily learn how to form letters by placing the wood pieces in the correct order and position. Includes 8 big lines, 6 little lines, 6 big curves, and 6 little curves.