What is an awesome non-painful prank?

Answer 1

If you want a good prank on someone who doesn`t like mustard do this:

Get a mustard bottle and squeeze mustard at them when there not looking. My brother did it to me today and i still smell like mustard ( you can all so use ketchup)

Also get a animal that belongs to the person your pranking. Move it somewhere else and tell that person it is dead they well cry tell you say i am kinding.