RE: the snapper poppers (I lost the quote link somehow)
Oh man, I was a small terror with those things.
After rigging the toilet seat...
Putting a couple inside the toilet paper core (to fall out at random or get crunched when it's used).
Stick the twisted tail part into the gap around the lever of the light switch and then carefully turn the light switch off.
Middle of the night, the light gets flipped on and they fall to the floor.
Door hinges too.
Pocket of the strike plate for the doorknob bolt, works best if they just push the door shut without doing that twist the knob first thing.
Putting them under the toilet seat should just be considered a rite of passage for guy with an older sister.
I always kept a couple of boxes of them in my tool box on the job.