ThinkGeek Gadget store is selling a Wii accessory called the WiiHelm. It time to have your head exercise, just put your Wiimote on the helmet and you can start to play Wii tennis using your head. Now you can have some potato chips while playing wii. The WiiHelm is available for $24.99. Here’s a video demonstration from Think Geek after the jump.

[via i4u]