Well, here's our Button trick even though we are eons late- we didn't get back here til pretty much after it was over. I just found this button at our little town's Pharmacy store. I didn't want to order one online and pay shipping so I just thought it'd be forever til we went into the city and I could get to a Staples or something- I was pretty happy to find this! I was a little worried about it saying No! but he doesn't seem bothered in the least, and it's kind of funny I think. If I hadn't found this on Tuesday I'd have tried it with a tap light. The auditory signal is good but the lights visual may work too...