The Wiifut has it's own games that you unlock as you progress. Each person gets their own profile where they analyze height, weight, balance, etc., right from the Wiifit board! Then you start exercising with the games, and a piggy bank clocks your time. The more time you clock, the more activities you can unlock. In fact, most Wii games have different levels and game you can unlock if you do certain things. For example, we have a carnival game that has skeeball, darts, table basketball, and more midway type game, and as you get better, you unlock more characters that you can be, more games, and different colors of the tables, etc.
Anyway, the Wiifit is fun exercise so far!