First of all, let me state that this is not my idea, but seeing as there is no Instructable for it at the moment, I decided to post it. I also borrowed the pictures. Just throwing it out there.
-1 large mason jar or glass
Optional (but recommended) material:
Step 1: Putting the Egg in a Jar.
Fairly self explanatory. Using a spoon, (or just your fingers) slide the egg into the bottom of a Mason Jar or large glass. No picture for this step....
Step 2: Adding the Vinegar
Add vinegar to the Jar, so that it completely covers the egg. then add some more for good measure.
The egg should not float. if it does, it means it's spoiled, and you probably want a new egg.
After all, why would you want to de-shell a rotten egg? It would smell terrible...
Step 3: Watch and Wait.
It should begin to bubble around the egg. Since the eggshell is made of carbonate, it is full of carbon. The acid reacts with it, and creates carbon dioxide gas as the shell dissolves. This step might take a while, so sit back and wait. It could take days. I've found that stirring it makes it look like it's going faster though, so feel free to try that.
Step 4: Marvel at It's Nakedness.
After a while, your egg should be totally shell-less. but in order to really enjoy it, you need to drain it. take the spoon (or your fingers, for you stubborn people) and hold the egg back as you pour out the vinegar. then just lift it out of the jar.
Step 5: Enjoy!
Now feel free to do whatever you like with your naked egg. Show it off, play a high-risk game of catch, cook it, throw it at an unsuspecting passer-by, ect.
okay, I was just kidding about throwing it at a random pedestrian.
I can't condone that.
Another fun Idea is to show it to someone, and give them an unshelled egg. then ask them to try to do it themselves. 9 times out of ten, theyll try to pick of the shell off with their hands, and it will burst all over their hands.