What kind of practical jokes could i try out?!

What kind of practical jokes could i try out?

I got a lo budget, but want to play a LOT of practical jokes (im that kinda guy) but I dont want to got for classic ones, like the 'bucket-on-the-door-"joke.
I get in trouble easy, so it has to be clean, no bad language on paper, makes a huge mess, or hurts anyone.

3 days ago
Better yet, just any kind of practical joke that you can do without getting in trouble

Carefully tape over the mouth piece of the phone so you don't see tape edges. They'll be sitting there saying, hello. Hello?

I called a co- worker from my cell phoone from the bathroom thru the work office phone. She answers and I say I'm the ----- county health dept and that she had been named the most likely party who was speading a venerial diease and that she needed to come in for a shot but in the mean while to exercize strenuous toilet washing techniques and comprise a list of her sexual partners and get in here for a shot. She didn't have the car so she called her boyfriend to tell him and ask for a ride. She told a bunch of people around her. How dumb... When I know her boyfriend is about to have to leave home to come get her, I saw a truck driver come in and I asked him to go up to her and say April Fools. She fell on the ground. Double cool cuz you get to pull the stunt and she never gets to know where it came from.