WATCH THE VIDEO!TRY THE EGG DROP CHALLENGE AND POST IT ONLINE! #eggdropchallenge You will need: 1 plastic cup of water with a mouth wide enough to fit the egg. 1 10” (25 cm) piece of cardboard or a small tray with a SMOOTH bottom 1 cardboard tube (paper towel or toilet paper tubes work well) […] The post The Egg Drop Challenge! appeared first on ScienceBob.com.