The composition can't open the experiment of breaking 400

This year's school science and technology festival, the teacher asked us to complete a task-"unbreakable eggs." On Thursday night, my mother and I made two devices: one is to tie the eggs with a rope, tie the rope in the middle of the box and let the eggs hang in the air; One is to hang a small box with a parachute filled with napkins and eggs. We threw it from the third floor first, but neither of them broke. Then we threw it from the fifth floor. The first one is that the rope broke before it was tied properly. The second parachute jump was successful, although it was made of garbage bags, which was a bit broken.

On Saturday morning, we continued our experiment. Grandpa made a protector out of a foam box, and my mother and I improved the device for hanging eggs. My mother looked up the method of making parachutes from the internet, and we made a new parachute, which was quite fun. We still threw the foam box out of the fifth floor this time, but when we took the egg out of it, we accidentally fell to the ground and broke it. Due to too much vibration, the device for hanging eggs failed. The parachute landed slowly, so it succeeded. We continue to improve this failed device. A hole is drilled in the middle of the bottom of the foam box, and the eggs can be poked out with chopsticks. Two pieces of foam are added to the egg suspension device and two long cardboard are added to the box, which increases the buoyancy and shock absorption of the air like an airplane. Both of them succeeded this time.

Our three devices were finally named: airplane, parachute and Grenade. Ha ha ha, it's so fun!