Our Little Mischief Maker

Do not be fooled by this cute, innocent, pie-filled smile. He is not so innocent ---at least not in the following instance:
Carter's a busy boy. He tends to get into a little bit of trouble because he likes exploring and trying new things a bit too much sometimes. Well this particular "new thing" I would like to share and remember, because I'm sure it will someday be as funny as Rob thought it was when I called and told him about it.
Here's how it happened....
So I'm upstairs on the computer checking my email, while Carter was putting the blocks away downstairs, (or so I thought) And oh...about 10-15 minutes had passed and I heard him coming up the stairs. He came running into the room with his hand full of candy wrappers and a huge piece of candy half in-half out of his mouth. I asked him where he got the candy. So we went back downstairs so he could show me and to my surprise I find out that he is now able to climb over the gate which blocks off the kitchen. On the other side of the gate were candy wrappers everywhere. -Needless to say he'd had his fill, but this is not the topper. The candy part was actually quite funny, the rest not so much. Upon looking around my front room/dining area, Carter apparently, (now this is all a guess as to how this all took place as I wasn't downstairs at the time, but I imagine this is how it happened.) Carter took his cup from off the kitchen table, dipped it in Lincoln's litter box and filled it as full as he possibly could, chased Lincoln all around the front room throwing cat litter at him. -Now I heard him laughing and saying "Meow Meow" from upstairs, but I had no idea what he was up to! I thought he was just playing innocently with the cat. He had thrown cat litter all over! And I mean all over! It was on the kitchen table, the kitchen floor, the high chair, on top and inside the box of russet potatoes, the front room, the couch, the chair, and even the window sill!!!! Seriously, it was not very funny. Just try and imagine this picture. I blew a little, well actually a lot. Not only had he made a huge mess which took me over an hour to clean up, he had been scooping cat litter and been next to Lincoln's shtuff! ---No, there was no poop strewn about, but there might as well have been.
I have no idea where this kid comes up with this stuff. Really makes you want to get inside that kid's head and just listen to all those crazy thoughts! He's rather smart, and I think he just gets bored and creative at the same time.
Unfortunately my over-reaction did not quash this new found fun activity. He did it a few days later. He didn't make as much mess as the first time, but none the less, I was at a loss for words. Not sure how to communicate that we do not get in the cat's litter box, nor do we scoop it up and throw it around the house! I guess we'll just have to work at breaking down this communication barrier. I just hope it doesn't happen again.