How can we drop an egg from 2nd floor without cracking it?
The answer is to reduce the impact of the egg with the 2nd floor.
This is a classic experiment from the science olympics. Look up some videos of the winners of the science olympics egg drop.
some ideas to use
1. Attach the egg container to a parachute. The parachute will slow the decent of the the egg reducing the impact.
2. Cushion the egg within its container. Air bags, bubble wrap, other means of reducing the impact.
3. Suspension place the egg container in a cage which is attached to elastic springs, rubber bands or other materials that can stretch absorbing the impact.
Use a combination of these techniques.