Put a walkie talkie in your mailbox, take the other one and go inside. Whenever somebody walks by, shout at them through the walkie talkie! Watch their reaction!
Wear a shirt that says “Life” and hand out lemons to random people on your street.
Suck in helium and shout in a public place, “I’m super and I know it!”
Go into a public place and pretend to trip. Then turn around, point at a random person and shout “I’m gonna sue you!”
Take a picture of a chair in a certain room. Then get a younger sibling, a friend, or just someone you know, and tell them you are gonna take a picture of them. Have them sit in the chair and stay still. When you take the picture switch it with the first one you took and say, “You must be a vampire, or a ghost or something. You didn’t appear in the picture I took!” Wait to see their reaction. ( I haven’t tried this yet, but if it works tell me their reaction!)
Go to a crowded place and pretend to be talking on the phone. Then say, “Yeah, the doctor told me not to go outside because it was very contagious…..I know right! I didn’t think it was either!”
Go up to someone and yell “Trust fall!” Then fall. If they don’t catch you, scream, “You lying backstabber! I trusted you!” Then stomp away.
Go into a public bathroom and hide in a stall, when someone opens the door say, “AH YOUNG ONE, WELCOME TO NARNIA!” (This may also be done at home. You could hide in the shower, cupboard, something like that.)