[rawcatslyentist]

You can always make a "pinhole camera".

Basically just make a hole in paper/cardboard if ya don't have trees and wall.

[Adder]

I’ve used a bucket of water in the past....

[Jamestown1630]

Or the paper ‘projector’. We made the camera, and also these these with foil in the middle for the pinhole, but this one doesn’t even seem to use that:

https://www.theverge.com/2017/8/9/16109520/how-to-diy-pinhole-projector-solar-eclipse-cardboard-paper-budget-safe