When you see the first screen, you are greeted by Herbert the Caterpillar. He is surrounded by his favorite food in the whole world - leaves. If you tap on the leaves, however, they will take you to all the places where Herbert works on his arithmetic skills!
The Practice leaf takes you to Herbert's Practice Place. Herbert will come up with problems for you to solve, and he will tell you if you answered them correctly or not. Note that instead of the usual way that you do problems on a computer, here you use a "tap and add" approach - you tap on a box and add the digit. Notice also that you can put carry values as well (borrow for subtraction is supported as well). And, unlike a workbook, Herbert never seems to run out of problems.
You can set it up to do one, two, or three digit values via the Setup screen. You can also tell it to use a single number as one of the operands (this is useful for adding by 2's, multiplying by 3's, etc.). All the main aritmetic operations are supported.
Tic-Tac-Math is one of Herbert's favorite games! You tap on a square and solve an arithmetic problem to earn it. You can either play yourself (you'll take turns being X and O), play with a friend on the same Palm organizer, or you can use infrared to allow two children on different organizers to compete (one could be doing division problems, the other addition of three digit numbers). While the kids play this, they'll also grow their arithmetic skills!