The Treehouse

Probably almost 20 years ago James (aka Uncle Dude) and Bob built a treehouse in the backyard.  At the time it was luxury - complete with outdoor carpet, plastic furniture, and a roof.  It also had a zipline exit and a trampoline beneath it, plus the TV was set up there a couple times.  After 20 years though it wasn't looking so hot.  Dylan wanted to see it, but it wasn't safe for him to go into.
This brings us to the reveal of the new and improved 2 LEVEL treehouse that now stands in Bob's backyard.  The roof is original - the rest is new.

 This top level is the 'sleeping level' where Dylan wants to sleep in his sleeping bag. (Oh, and he wants a TV out there)

 Grandchildren get special attention - James had a ladder to get in - Dylan has a fancy set of stairs.

All that is missing is the zip line and trampoline - but he has a couple years to build on.