1.Buy a weird fruit or vegetable from the store and ask the check out people what's in it.
2.Put ketchup or mustard packets underneath the little nubs on the underside of a toilet seat, then carefully place the seat back down. Wait for someone to sit on it and they will pop the sauces >:3
3.(Game related) Start roleplaying with your group and completely ignore someone's posts, like you've blocked them.
4.(Game related) Act like you're just about to tell someone something important, then either A: start buttswinging in their faces, or B: pretend to lag immensely and walk into the distance
5.Replace your family's sugar with salt, and vice versa
6.Rubber-band the handle down on your sink's squirt hose thing(idk what it's called XD), and point it in the direction someone would be when washing their hands