I made a routine on the Wii Fit Plus made of muscle and yoga routines to help build suppleness and the rhythm boxing and step game for cardio building and fun.
I bought EA Sports Active and EA Sports Active More Routines for the 4 and 6 week challenges, which even a naturally lazy person like me can enjoy, but I also use the boxing and step routines on More Routines just for fun.
Using my fitness routine on the Wii and the boxing and step routines I can easily burn up 6-700 calories over 3 x 15 minutes sessions a day.