Our Dennis Brady Circles and Squares puzzle is probably my new favorite puzzle - I've done it five times in the last week, three of those times with friends (this is a great puzzle for putting out - people can't help but engage).
There are only 65 pieces, and each of them is a little piece of art (see example pieces below).
The pieces were designed by our puzzle artist Tara Flannery, in a style inspired by the work of master handcutter John Stokes III.
The puzzle is pretty easy - maybe 20-40 minutes for the average adult puzzler, but it's 20-40 minutes of just pure tactile and aesthetic and intellectual pleasure.