While Jim was away in San Diego, the kids and I made our own "litmus" paper from boiling red cabbage. Simply chop up the cabbage and boil it for a few minutes, and you have an instant home test for acids and basics. We tested all kinds of things from vinegar and lemon juice to baking soda. The colors turned an incredibly vivid color, and the kids had so much fun watching them change and trying to change them back again. Once we'd done all the tests, the kids decided to try to neutralize the results, turning the pinks and blues back to the neutral purply color. This was, of course, great fun as the acids and bases reacted, sending purple fizz everywhere!
After a week away, Jim was much missed, and the kids had great fun reconnecting with Papa. Elaborate wrestling games were the order of the day, as Jim donned the dragon costume and Sam, brave knight, rescued his princess sisters. The dog, of course, couldn't resist joining the fray, though it's hard to say what her role was supposed to be. I believe by the end of the game, she had taken on the part of Shrek's donkey.