Where can I find a small, inexpensive,recordable device (10-20 seconds) that is motion activated?

Visualize say a lifesize Halloween or Christmas character that speaks or makes a sound when activated by the motion of a passerby. I need to record a 10-20 second message of my own that will playback when activated.

A recordable greeting card.  I'd wire it up to some cheap amplified speakers (the kind a lot of folks use with their computers), and add a switch on the floor for the guests to step on. 
Burf8 years ago
Try Deal Extreme, they have tons of bargain priced gadgets like that.<br /> http://www.dealextreme.com/<br />