It had a prominent metal mechanism in the center, which originally turned to push the toy capsules out when a quarter was inserted, and it also had a wire arch that spanned the front window, used to hold the machine's original advertising card in place. They had a machiney, space-agey, electrical look to them, like props from the set of Metropolis, I thought...so I installed some 1950s children's space print fabric as a backdrop, then arranged a scene using vintage Archer Space Men and robots, along with some 1950s space-themed dexterity puzzles.
A closer-up view:
It hasn't really helped alleviate the crowded display area,
(which is supposed to be my kitchen table)
but it came out pretty cool: