DO NOT PRESS "M" (if you do make sure to have it on full volume) Sounds A to Z except for S which stops the sounds and 0 to 9 Plus All arrows + spacebar If you can count (and add) then you would know there are 40 sounds, 26 letters - 1 (because of "S") = 25 + 10 numbers = 35 + 1 spacebar = 36 + 4 arrows = 40 sounds