I love sculpting small, practical items. Dice are a particular obsession as the limits of fairness and the materials used pose interesting challenges for me.
I also enjoy replicating spaceships from my favourite game, Oolite, as miniature Airfix-style model kits.
As a programming and design challenge I've also created a small suite of OpenSCAD modules that can help me create bespoke heraldic designs. Basically, you choose the design and I can probably create it for you in a few hours as a pendant, key fob, ear drops or cufflinks.