From MakersBox on Tindie:

Soldering Kit for Doctor Who Fans
Show off your Doctor Who cred with a DIY badge you can solder yourself. Powered by an Attiny85, lights and sounds like an 8-bit TARDIS. CR2032 Battery not included.

From MakersBox on Tindie:
Soldering Kit for Doctor Who Fans
Show off your Doctor Who cred with a DIY badge you can solder yourself. Powered by an Attiny85, lights and sounds like an 8-bit TARDIS. CR2032 Battery not included.