Vguc pfsf Recommended Age 7 yrs. - 11 yrs. / 2nd gr. - 6th gr. Description Our self-checking Multiplication Machine makes math so simple, kids can teach themselves! Children just press the equation buttons…and the answers pop up for immediate reinforcement! You get 81 equation buttons locked securely into the tough 8 1/2" x 9 1/2" plastic frame. Item # LC1168