The Hut are selling "Smartypants" for the Nintendo Wii for £12.93 Inc Del)
You can get cashback through the usual sites (e.g. 5% Quidco, making it just £12.28)
The next best price seems to be £14.93 from ChoicesUK.
Prove You're The Smarty Pants!
Thousands of age-appropriate questions in eight categories.
Spin the wheel, raise your hands and dance your way to victory!