This powerful teaching tool was developed in partnership with Mayer-Johnson, the makers of Boardmaker software. The set includes over 270 Picture Communication Symbols (PCS) selected by a highly-experienced Speech and Language Pathologist as symbols representing words and phrases most commonly used in a school and home environment. Each symbol is printed on a high-quality, washable, reusable vinyl magnet and is accompanied by a second magnet that includes the word or phrase that describes that symbol. These companion word magnets are designed so they can be used with our award-winning Kidwords family of magnets making this an extremely powerful and expandable language arts curriculum. In addition to over 500 magnetic pieces, this set includes two magnetic-receptive Kidboards (additional Kidboards may be purchased separately). Ages 3+, Grades PreK+ WARNING: Choking HAZARD Small parts. Not for children under 3 yrs.