See the full review at http://www.timetoplaymag.com/toys/4199/sassy/sassy-seat-doorway-jumper/
It attaches to the top of molded doorframes, so parents can place it in any doorway of the house. The locking mechanism holds the jumper firmly in place. There is a clamp at the top that clamps around the doorframe. Adjust the strap until the jumper is at your preferred height off the ground. (You want your child to be able to touch the ground with the tips of his toes, not standing with his feet flat on the floor.) Once adjusted, turn the locking mechanism to lock. The Sassy Seat Doorway Jumper includes five toys—crinkly bee, mirror, flipper gripper rattle, teething wing firefly, and clacking bugs—that can be attached to the loops on the seat cover, and they can also be detached and used independently from the jumper.