If you have friends that are easily stumped, this is a set of stickers you’ll definitely want to get your hands on. These stickers go over your outlet and have ON labeled on both the top and the bottom. Of course anyone with half a brain would just start flipping without worrying about it. However, if your friends are a particularly unique level of stupid you’re bound to confuse at least one or two of them. You can purchase these in sets of ten for £3.99 or about $6 from Spinning Hat.