It was my son’s sixth birthday recently and his dad and I managed to clear and dig over a large enough patch in the wilderness garden to be able to put a trampoline there, which was his main present. It made such a difference to have two of us working and we cleared the space and dug it over in less than a day, getting rid of as many brambles and bindweed shoots as possible in the process. 
It is now covered in heavy duty weed matting and bark. I just have to finish it off now and assemble the trampoline (yikes!) but have been busy writing assignments for my teaching qualification. Soon though, and then the small matter of sorting out the veg patch…and the rest of it…
You would definitely have a lovely garden soon!
Quite the transition…your son will be overjoyed when your construction job of the trampoline is finished. 🙂