There’s a dinky little science museum in Watertown. We’d seen it, but we hadn’t been inside until recently. Turns out that although the whole think is pretty low-budget, they have some neat exhibits. Otis’s favorites: a regular old checkboard and this coin funnel. (You know, the kind of funnel they have in airports and museums where you slip a coin down a slot on the side and watch your money go down the tube?)