Our specific model is a Island Hopper Jump-A-Lot Double Slide Bounce House 2012 available from Amazon here. I've been very happy with it, except that the walls along the top slide aren't high enough, and I fear someone running down the slide (as 3-year-olds are wont to do) might fall out. To help prevent this, I sewed on webbing loops and installed a rope safety net, effectively extending the wall upwards.
Step 1: Planning the net
Corvidae hasn't fallen out. However, in the first image, she's standing on the tips of her toes and you can see how close she is to going over. The second and third images are more relaxed postions.