Flashcard type drills for children recently introduced to subtraction.
Select a number 1 through 10, and random cards will be presented of that number and another number between 0 and 20. Or select ALL to do 1 through 10 randomly.
Get 1 point for each correct question. Lose 1 point for each wrong answer.
For positive reinforcement, the character says things like "yes" and "I knew it" for correct answers. (There is no audio for wrong answers.)
Thumb Drummer - Virtual Drum Kit 