I do not really like disposable things, but they can sometimes make life much easier. Disposable dishes, disposable lighters, razors - all this is cheap and not a pity to break-lose. Here is a one-time flashlight, this is the thing that I would definitely buy if someone sold them. Of course there are flashlights in the form of trinkets or flashlights from emergency kits that turn on in sea water. But this is not it.
And so for making the simplest homemade flashlight do it yourself we need: double-sided tape, a lid from a jar with sour cream, a polyethylene foam heat insulator, an LED and batteries.
Everything is very simple. Holes are made in the foam.
Batteries and LEDs are inserted into these holes. As a switch, a plate cut out of the cover is inserted between the batteries.
The front panel is made from the same cover and double-sided tape.
At the back, everything is closed with double-sided tape, and the protective film remains in place. All. Flashlight is ready. To turn it on, you need to pull out the plate, and stick the flashlight itself anywhere. At least on the forehead. From several flashlights you can put a picture or an inscription. It will burn all night.
You can stick on your hand. I'm fourth.
On the tree.
To the barn.
You can make scary eyes out of two red ones at night in the forest. Two greens from the old hollow do not look bad either.
Video instruction for the manufacture of a disposable flashlight: