Driving by kid's birthday parties with huge air water slide rentals in yards reminds me of my childhood.
One summer, probably around 1979, Daddy bought some sort of rolled up plastic from the hardware store. He unrolled on a small slope at our house and put a water hose at the top.
Jamey and I had fun for a couple days. However, after many grass burns, plastic cuts and a sore chest we let Daddy roll up the plastic. On for us to ride bikes again. (Until 1 pm. "Days of our Lifes" came on at 1....)