Wanting to approach the simplicity of the famous LED Throwies, the name LED Kissies was already lingering in my mind, even before I came up with the concept presented here.
LED Kissies are ”kissing robots” reduced to their essential parts: an LED, a battery, a strong magnet and (optionally) some card with a picture. They are easy and fast to make and pretty low cost.
Here's a short video:
Step 1: Materials (and tools)
2 Blinking LEDs working on 3V. Some blinking LEDs are clearly underpowered on 3V. I used LED's from Opitec (n° 236135).
2 Lithium coin cells delivering 3V each. The thin CR2016 type is easiest to work with, but with some bending of the LED legs, other types can be used to.
2 Strong magnets (Neodymium type). I used 4 mm thick/8 mm diameter ones from Opitec (n° 208305).
A couple of square cm of card stock. Photo card stock/paper works well.
You will probably need scissors and a printer to make suiting pictures. But you could also use ID photos.
Step 2: Assembly
Add the card stock to the + side, over the LED leg and keep it in place with the magnet. Check if the + LED leg is well under the magnet. If the LED continues blinking, bend the free leg away from the battery, just enough to break contact.