“Experiment” is an all-morning messy endeavor at our house, and I usually end up begging Greg to help me come up with things they can use for their “experiments”.  Last weekend was a slam dunk: baking soda, vinegar, eye droppers, and champagne flutes.  That’s all it took to keep them happy and occupied, until they asked to repeat their iridescence experiment.  I had to let them do it because all good science comes from repeatable results.  Our lab got messier after that…