This could be a pretty neat family message center.
Gakken presents all new 2005 creative Cup Phonograph Kit in Edison-style. It uses the same method that Thomas Edison used. However Cup Phonograph Kit in Edison-style is much easier to set-up and as effective as Thomas Edison-style. Unit allows you to record your voice through a cup onto another one and also plays it back! Package provides everything you need such as a motor, a battery box, plastic cups, and a needle. An English manual is also included to guide your way though. Ultra fun experiment; an absolute neat gift idea.
Link: DIY Cup Phonograph Kit
Geeky Link: Wifi Detect Shirt