We understand this is a very difficult question, but what’s the best part about summer? Barbeques are great and so are poolside shenanigans, but nothing compares to the greatest warm weather invention in all the lands—the Slip N’ Slide.

Besides its simple entertainment factor, this old-school childhood toy is a breeding ground for fails. Think about it—when you take a tarp and cover it in water, people are bound to be slipping and sliding and falling all over the place. In other words, failure jackpot! Check out 10 of ‘em below: