The Music Activity Board is an indispensable music-teaching aid. The magnetic board (which is also "dry erase") shows the grand staff on one side and a diagram of a keyboard on the other. Ten round magnets (five black and five blue) are included to use for representing notes on the staff or to indicate keys on the keyboard. This board is used for Music for Little Mozarts Levels 1--4. Dimensions are 11 3/4" X 8 1/4". A dry erase marker (magnetic so it doesn't get lost!) is also included. An additional set of 10 magnets is available separately (27582).