Minor Malorum Duorum

When a 10 year-old girl from the South-East of Britain stepped on the scale of Nintendo's new game Wii Fit, she expected to get the blood pumping with some fun, casual exercising. Instead, the game's software told her she was fat. She was devastated to be called fat and we had to work hard to convince her she isn't."

While the somewhat callous system is reasonably accurate in determining the BMI of adults, a child's BMI can literally change from day to day. Experts have deemed its use in Wii Fit misleading.