As a child, I made a sort of static kaleidoscope, following instructions in a magazine. (Scouts?)
You cut the end off a shoebox and replaced it with tracing paper. You cut an inch diameter hole in the other end to look through. Inside you built a model garden, using a mirror to represent a pond, stones, bits of moss, twigs etc. Hold the box so that daylight shines in on the scene through the paper, and view through the little hole.
Using this concept, I think l’ll enter this competition. I’ll call it “sorting the goods” the scene will be the interior of a goods shed, with light in the main coming from the open doors at the far end.