March 14, 1:59 pm, is really when to celebrate π (Pi) day. It's also Albert Einstein 's birthday! How cool is that? We celebrated it today at our Tri-Valley Explorers homeschool park day, a day early but it was fun anyway :-) I forgot my camera, again, but Jenny kindly emailed this group shot of the kids to me. (She has more photos here .) Serenity is second from the left in the front on her knees. The colored paper chain circle represents 300 digits of π , each color was connected with a digit from 0-9 and each kid and most adults there did at least a 10 number sequence. We also had "round" food which turned out to be mostly cakes, cookies and crackers :-) Early in the morning, on our way to Serenity's gymnastics class it was sort of dark and wet out, misty enough that I had my windshield wipers on most of the way there, but as you can see above it cleared off and was nice and warm by noon. There is a bunch of very cool π stuff here. Finally, there is on...