Transparent Jumpolene....best invention ever.  Especially for hyposensitive children like my son who need overload all the time.  This is so worth the forty bucks it cost, even if it breaks in a couple months!!!  He jumped for a few hours and got so much of his energy used up that he actually sat for a half hour before he went to bed. SUCCESS!!!  My daughter just loved going in and out and in and out and throwing every ball she could find in the house in there just to jump and watch them bounce around.  My poor little man wants to be right in there with them but at eight months old, definitely not a good idea.  Maybe when the twinettes are taking a nap I could put him in for his bouncy fun.  Wish I could get in there with them!!