The listing, Johnny Jump Up!! has ended.
I bought this at Walmart, and my son probably jumped in it a handful of times. He loved it, we just had another jumper that was here and this one was not. It clamps firmly to any door frame, and has a spring mechanism so that the little one can jump up and down or twist and turn and still be supported. This is a great product, especially if you want to get something done and your child likes to be held a lot! Believe me, I know the feeling :)