How old do you have to be

I was told as long as the person (child) can walk they can jump with a waiver... This was for a birthday party... There are different sections for different ages of people. Everyone at my son's birthday had fun (ages that jumped were 4-43)

4 plus a parent has to sign a waiver.

Be safe age 4 +

Four years old. All children (parents) must sign a waiver to participate

Yes as Lisa commented