Stereographic Projector
I had to make one: https://www.thingiverse.com/thing:2094215. Projection is shorter range than I was hoping for but it’s still fun and gets the kids thinking.
Freedom & Unity
I have a penchant for Vermont seals & coats of arm, and I found some good ones in some old books. I really like turning old engravings into large plots, these look great in person.
The new recursive inset fill algorithm is incredible and making me want to revisit previously hatched plots.