Perfect, and perfectly creative. Gonna steal this instead of downloading paper ones from drivethru, as was my previous solution.
I'd recommend the "fork" ones (which came from a party warehouse store ages ago) personally. If you need a really precise line of sight/effect over/through a wall you can stick an index card or similar in them while you do your measurements.
The other ones are Xmas ornaments cut down to size, of course. Everything had an ink wash or two and a solid seal coat, but you could easily skip that and leave them in their native translucent colors.
Probably plenty of other random plastic widgets out there that would serve as well. Almost anything that's at least 3" long should do. These were just what I had on hand.