A trampoline without the eyesore of a big bulky enclosure Easy to assemble Brand new and exclusive to John Lewis for 2017 - get bouncing with the JumpKing 10ft In-Ground Trampoline! The JumpKing In-Ground Trampoline sits close to the ground to allow children free, open play without a big, bulky enclosure. Designed and built by Jumpking - the world's leading trampoline company - it comes with all the quality and strength you would expect. Fun, safe and easy to assemble, this trampoline is a perfect addition to the family.