In between sessions of trying to prep the manuscript for page layout, I've been playing with Euclid: The Game. I am loving it. It may be just the same constructions kids learn to do in geometry class. But geometry is my weakness in math, and I love trying to figure out how to do these constructions. Exactly a year ago, I posted about another construction game. The two are different enough that you might enjoy doing both. I'd love to hear what you think of them.
Here are a few links to other geometry construction tasks: