She discovered what the shiny silver piece of the toilet did... she likes to watch it flush... add those two together and you've got a cat who wakes you up at 3 am flushing the toilet repeatedly.
She also likes to turn on the light so she can see it better
I sure wish my girls would flush sometimes - lol, sure would beat scooping the litter 2x a day lol. Mine have discovered how to turn the lights on and off and unlock doors though lol
The only thing Zebra knows how to do is open the closet door. My cousins cat knows how to use the water cooler. He holds down the handle until the dish is full and then drinks it. My parents have a video of it, its pretty funny to see.