This is a shameless plug for one of our own from the olden times (pre-release). @m_raynsford did a great set of fractal puzzles (he posted the files for some of them here and on his website) as well as the eponymous sharks-with-lasers and a host of other really cool laser projects.
Last year he did a series of fractal puzzles on Kickstarter and they were immediately copied by some miscreant although when folks here found out a bunch squawked and Kickstarter took the offender down.
This year it looks like he’s got something even more diabolical (and incredibly more difficult to copy). Since he’s not posting it, I figured I would - I’ve already gotten in on the early bird so I can afford to let you all in on the campaign too
I have a son who is going to be seriously challenged for Christmas this year. And with Martin I’m certain it’ll be here on time (usually I don’t count on Kickstarters to meet their dates - his did last year and no doubt it’s a good bet this year too).