The rubber golf tee seemed way too fussy for what's basically just a trucated cone. Doesn't seem worth it for something you could probably do using a plastic cup from the same shop. Or even a stiff enough paper cup.
I like the tanks though. Specfically the bit about how the stacked discs show through the glue-softened paper to create a paneling effect. That's brilliant clever. The bicycle caps look like they might make good post boxes or public trash cans in 28-35mm.