For a geeky little friend's 7th birthday (that is a compliment, not an insult, btw) I helped Monkey stencil a tshirt (with freezer paper).
A Portal shirt! Inspired by a design online (which I can't find now - but again, they don't make them small enough - like the Totoro ones or The Cure ones). Monkey really wanted a design with a turret, and this is the one he picked.
Also recently I made a triangle shirt (inspired by this one). It was fun to make, I drew them on freezer paper and then used my rotary cutter to cut straight lines. Metallic gold paint really stands out on dark shirts (again).
I'm pretty sure I never posted our stencilled Zelda tshirts either. I should find those...
If you've somehow never freezer-paper stencilled before, I made a quick how-to (check my sidebar) years ago - it's really easy! I've done quite a few.
p.s. It's March 14th! Happy Pie Day! (3.14)