How to make a home made slip and slide that is big enough for adults to use. I put this together on the 4th of July for my family to play on. If you are looking for fun things to do for a outdoor party. The Adult Slip & Slide is a great idea. Lots of family fun the whole day. My kids were telling me all week that it wasn't going to work. But they sure enjoyed slipping and sliding on it. Great Summer Fun.