The crawl through door is raised a bit so the kids won't just fall out. Plus there is a gap all around the inside so things would fall in between it. I still wouldn't recommend this product, because we have only had it since Christmas and it already popped. It wasn't a matter of weight either, because my girls are 1 and 2.

I would say pretty tough, unless you have a small air compressor. Otherwise, I plan to leave ours up.

Up to 3 or 4.

it takes around an hour with a manual air pumper

I'm not sure how long it should hold air, but since it keeps leaking air from the seam it lasted 2 weeks or less or 2 different purchases or this item.

I know they recomend the child be at least 3 years old however we bought this for our 2 yr old child and she is able to use it. Weight limit they recommend is 120 lb.

It comes with one repair patch. Hope that answers your question. :)

There is probably about a good 10 inches before you get to the door of the bouncer, so I would suggest atleast 1 bag of 100 balls, and see where that leaves you. :) Hope that helps.

Yes you can use a pump

We have the previous version of this and the capacity is 2 kids at a time and no more than 120 combined pounds.