Mechanistic Affinity

You can spend a few hours and 1+ FP to attempt to concoct a mechanical contraption to achieve any specific simple goal (use a Check of your primary attribute). Think gears, belts, pulleys, etc in a small pocket sized creation. As an example, you could craft a music box, a clock, a small mechanical hinge to open a door. The DM will adjudicate the complexity and feasibility of the project.