I added several lights, outlets and shelving for my stereo, but really you could pretty much anything or nothing in there.
Step 1: First: Sketch what you want this to look like...and make a short parts list
I usually have more than one idea sketched out, so I go back and figure out what I think I can afford.
The first idea involved making a accordion structure that would segment the walkway to my front door to create "rooms" as the kids walked up. I still may do this, but not this year - last year was too spooky and some kids would not come up the walk so I am trying to tone it down...
Back to the project - after I sketched the cemetery gate, I estimated what I would need in minimums.
2 - 4x8 sheets of cheap plywood
20 - 10' 1/2 PVC pipe (schedule 40 - sprinkler pipe)
4 - 2x4 8' long
6 - 1x4 8' long
6 - PVC 3/4" to 1/2" T fitting (close up to follow)
6 - PVC 1/2" end caps
1 - 4x8 sheet of pink (or blue) home insulating foam board
Foam board glue
Spray paint - cheap stuff $.99 black and gray (gray is double what the black is but you only need 2 cans - I used 12 cans of black on this project)
I needed other stuff too - but I have a pretty good stock of random parts and hardware as I have been doing this for about 20 years now...