Here’s a great youtube video of a math circle in Richmond, CA, run by Sue VanHattum, called the Math Salon. Sue has set up her event in many ways similar to what we have done at the Bard Math Circle – a great selection of mathematical activities with enough structure to support curious children and their parents, but not so much to make it overly regimented.
Sue also writes the blog Math Mama Writes…, which besides regular reflections, offers lists of Math Education Books, Games and Math Books. What a great math resource!