If you want to play a good prank on someone an egg wold be good for you. here are the steps for getting an egg ready for pranking.
1. First you have to slightlycrack the bottom and puncture a hole in the bottom to let the insides drain out.
2.After the insides are all out the egg shell is probably dirty, so you need to wash it. But BE CAREFUL!
3.Now the egg is rweady for pranking all you need to do is think of a good joke to play on someone. Enjoy =P
(the hole isnt supposed to be that big)