How can I build a device that allows an egg from breaking or cracking when dropped from a high altitude??
362440
There are many possible implementations, but the underlying principle is the same... there are 2 strategies\n\n1) Trying to extend the eggs acceleration (reducing to 0m/s) as long as possible, so the rate of slowing down is reduced.  This reduces the force on the egg's structre.\n\n2) Trying to reinforce the structure of the egg (encasing in plastic or styrofoam or rubber) such that it can structurally survive the rapid acceleration to 0m/s upon hitting the ground, because the force on the egg is evenly distributed across it's surface.
565314
Find yourself a box of the correct dimensions.\n\nWrap your egg in bubble wrap--the kind with the bubbles that are about as big as a quarter.  Wrap it in as much as you can use without going over the weight limit.  The egg should be in the center of the bubble wrap.\n\nThe bubblewrap should prevent the egg from breaking.  The key is to get the egg in the center so it has equal bubblewrap around it.\n\nIf you can find a styrafoam box that is 7cm x 7cm x 7cm, that would be the best as it would easily meet your 400cc requirement and no side longer than 20cm!  Plus, styrafoam will absorb shock!
1117570
If I remember right you can try dropping it into boiling water (be careful) .. it will heat up the air inside, expanding it and possibly fixing the dent ... don't leave it in long and did I mention BE CAREFUL .. if you are not an adult please don't try it until you get some help !!
460422
Probably dipping the egg in liquid nitrogen for a while would make it so hard it would be nearly unbrakable!
242213
Cool.\n\nUse the FOIL method. First, outside, inside, and last.
709571
try this:  Stand on a lawn and throw an egg up into the air .. Just chuck it like 40 feet up and watch what happens when it lands on the lawn.  \n  Don't throw it on concrete and try to make sure it doesn't hit any rocks. \n  When I was in eigth grade and my science teacher told me to try this i was absolutly flabbergasted when I saw the results.  I ended out making 75$ from my family when I bet them I could throw an egg over the house and it wouldn't break when it landed on the other side.
64492
Increase the drag, or resistance by enlarging the surface area. The parachute is a simple solution. \n\nHave you thought of making a whirly-bird/helicopter-type device to slow down the fall of the egg? Balsa wood angled correctly should be able to produce simple a rotary blade that would slow down the decent of your egg. Keep me informed.
39067
If you drop the boiled egg on the top or the bottom of the egg, it will not break. The top and bottom of the egg are the strongest points of an egg.
853730
The forces are gravity down  and air drag up.\nIf you want your egg to land softly, one way is to increase its coefficient of drag -- give it a parachute.
141531
hard boil your egg.  :)
873777
pack it in foam, put a parachute on it... and drop it from the BOTTOM of the 3 story building!!!
730854
Gently place egg in water...observe it floating.
35922
I suppose, from your wording, that this is a variation on the egg drop test where the egg is put into a package first, and then dropped. I would guess that means a parachute is out of the question. \n\nThe list of exclusions seems a little illogical but one thing I don't see on the list is cotton, wool, yarn, or even plastic wool. A large enough quantity of cotton balls would absorb energy. \nWater? \nA partially filled balloon? \nYou could essentially replicate a 'foam' using attached balloons or plastic bags filled with air. \nHow about a net made of elastic fiber? The elasticity, weave of the net, and the angle of the net's parabolic form would all be variable factors.
971251
Wrap in bubble wrap and put in a tube or a box thats how i did it.  it survived a 30 foot fall.
813303
Eggs are very strong at their point. Weight the tip to hit at the point.  Bubble wrap the tip.  Think of an extension that is spring loaded with a weight at the end.  The balance of the container just has to protect it from bouncing.
201530
Attach a falcon to the prototype.. Think it will fly high! :-)
1143368
Change the question to "fall in air" and think about it. A parachute drops slower than a rock. The shape influence the speed due to drag.\n\nSame for water.