Sometimes when I go to Walmart I drop nickels on the floor. I do it in patterns, starting with a line behind me and then moving throughout the aisles to see who will follow and how quick they are. usually it's little children but sometimes you get the big people in the scooters. They are the toughest to fish for; they use their grabbing hooks to pick up the nickels until they find my pile of quarters sitting right in front of the cheese stack. Oh, but the quarters are too high to reach even with their grabbing devices, so they reach and they reach and they reach ... and then the cheese stack falls down on them, and of course I silently laugh while the person flails about in their go-cart, covered in cheese blocks and quarters. Then of course the neighborhood kids come running up to grab the change and the candy from the cart person's purse. That last part only takes about a half-minute but it is worth the wait.