Great for egg scavenger hunts, egg hunt periodic table bingo contests or for winning door prizes. Some of these radioactive elements are pretty rare and have a short half-life.
Step 1: Safe handling of materials...
This project is just rigging up eggs with LEDs in a repeating fade pattern controlled by a microprocessor like an Arduino.
The egg carton is used to hold the eggs and the magic Arduino is hidden in the package.
You can go with a whole egg or have it hard-boiled but I just used an empty egg shell since that would diffuse the LED light better and not be as opaque.
A little bit of fiberfill is stuffed inside the eggshell for better light distribution.
I used an Adafruit Flora microprocessor board and battery pack.
I used LEDs in different colors with appropriate resistors soldered in line.
Know how to wire up and program your microprocessor.
CAUTION: Know how to safely work with electronics and raw poultry products. If you don't know, ask.