FLORA-Powered TARDIS Costume (for Dogs!) @ The Adafruit Learning System. Costuming is a natural for considering adding electronics, especially during Halloween (search #ElectricHalloween on Google+ for a range of projects including those highlighted by Adafruit).
Everyone knows that Spaniels are adorable, but a Tardis Spaniel is even cuter! Spidey (shown above) is wearing a blue knit Tardis sweater that keeps him warm on October nights and also hides a wearable electronic project that plays the Tardis woop-woop effect and flashes a blue LED as well.
This project uses a Flora wearable processor and the VS1053 MP3 music player module which plays the sound of the TARDIS from Doctor Who. A Flora NeoPixel is used for the blinking blue light on top. The project lays flat for a wearable project. An infrared receiver is added to mute the sound when you want quiet (although you could also use it to switch between different audio tracks)
This project shows the flexibility of flora in making more advanced audio projects. Since a good number of digital pins are required to use the VS1053, this project demonstrates use of the extra pins on the Flora ICSP header for digital signals.