Professional handbook features proven manipulative-based instruction and step-by-step, photo-illustrated lessons Professional handbook features proven manipulative-based instruction and step-by-step, photo-illustrated lessons Kids build math skills such as addition, subtraction, sorting, shape attributes, patterns, probability and more Comprehensive set includes: Attribute Blocks, Color Tiles, Color Cubes, Pattern Blocks, Three Bear Family Counters, and more Features handbook with 52 lessons Ages 3-5