Slip-And-Slide 101, the Remedial Course

I don't know how this happened, but my kids had never been on a slip and slide. Ethan went to a birthday party where they had one and he said he loved it. I decided we needed to get one since they are so cheap and to rectify this atrocity that was killing their childhood.
We finally had a day where it was warm enough to open the package and set up the slide. I put it on a slight slope, nothing to steep, and waited for them to break into the gorgeous grins that adorned the kids on the box while they slid on their cute tummies and squealed with laughter.
Well.....I should have known better:

It's kind of sad when you have to pay your kids to try something that defined your generation.