Inside, there's a replaceable CR2016 watch battery that's said to last more than a year, a Bluetooth module and antenna, an LED-lit ring and a piezoelectric speaker.

ENGADGET: StickNFind Bluetooth stickers let you tag and locate your goods with a smartphone (hands-on video)

Droplet is a compact self-contained module with an integrated RGB LED, a photodiode and a CR1216 lithium coin battery -- which provides roughly one day of power in the gadget's current early prototype status.

ENGADGET: Droplet and StackAR bring physical interface to virtual experiences, communicate through light (hands-on)

This particular e-garment packs quite the selection of hardware, as you can see above -- a trio of LilyPad Arduino boards (and some custom ones), a Bluetooth module, 12 x 12 RGB LED "screen", speakers, bend sensors, a heart rate monitor, shake motors and a power pack.

ENGADGET: Woven's wearable platform for gaming, cool points and a whole lot more (video)