An add-on that fixes the flashlight and a prism so that flashlights can make a rainbow!
Tests
How it works
The main part snaps onto the flashlight. Two small disks with triangular indent goes into the hole of the main part. They are for holding the prism in place, and they are rotatable. This allows the angle of the prism to be adjustable so that it produces the best rainbow.
Once the angle produces a good rainbow, fix the disks with screws through the holes in the big part.