The Privy is supposed to be Private

"Well excuse me, little scrap", snarled Tiger, "the privy, as the name suggests, is supposed to be a private affair. This is certainly not a sandbox for you to play in, it is a litter box for us cats to do our do do in. Now stop playing in it this instant!"

As you can see litter box training has become a game to tiny Princess who still has to learn that it is a private affair and not something to do together with the bigger cats.