Last month
ladydrakaina was making a TARDIS dress. It obviously needed a TARDIS hat which would light up and make VWORP VWORP noises. So I got called in.
There is a complete writeup on the Attoparsec blog, but here's the demo video which shows off all the important bits:
There is a complete writeup on the Attoparsec blog, but here's the demo video which shows off all the important bits: