Biscuit tin amplifier
A 3.5W battery amplifier in the Homer Simpson character tin. Modelled here in the most acoustically vibrant room in the house ;)

Insert plug in here...
Noise comes out here.
I'm planning to leave this one in the Alt Tech centre for people to demo the electric instruments on.
It's a bit of a distraction from the actual instrument making, but I can build these little amps to order, price £45 - 50 depending on the choice of tins.

Another little battery-powered amplifier. This one has a preamp module for use with a piezo pickup.
A selection of my work is available for purchase from