Heading to the beach or pool this weekend (or this afternoon) to try to beat the summer heat? Sounds like a pretty good idea. But don’t just head out empty handed, with nothing but a pair of trunks and a towel. There are lots of cool gadgets that can drastically enhance your day in the sun—and for that matter, there are a lot of not-so-cool gadgets, too, that will at least make you laugh. And all of these gadgets are the subject of today’s list. So take a look before you apply your sunscreen and your fingers get all greasy.