We're happy to present this article from our partner site Yahoo! Shine:

Yes, that's a cat on a toilet. And yes, he does look pretty pissed about it. The whole Internet has just discovered the Litter Kwitter, a potty training system for cats that was—up until this point—known only to a rare breed of ambitious cat owners.

Created by a woman who toilet-trained her own cat, the Litter Kwitter works like this: You put a color-coded litter-filled ring with a very small hole on your toilet bowl. As your cat learns to jump on the porcelain throne every time he needs to relieve himself, you switch to a ring with a larger hole. This goes on until your animal suddenly realizes he's standing on a toilet bowl, praying he doesn't fall in.

Related: 10 Least-Trendy Cat Names of 2013

It's great idea, but according to the people who write reviews on Amazon about cat toilet training, it's not that easy.

Please take a moment to enjoy some of the comments posted about the Litter Kwitter, because they are brilliant:

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Christoph Niemann first charmed us back in 2009 with his quick-witted I LEGO N.Y. photos, and now, the acclaimed illustrator is back on our geek radar with his first ever interactive iPhone and iPad app, Petting Zoo ($1.99), which is too cute for words. Seriously: Christoph's app is just drawings and sounds.

The virtual picture book prompts curious minds to poke and prod over 20 different hand-drawn animals. With some nudging, pulling, and swiping, the animated animals react in surprising ways, and a different musical sound plays for each creature.

Christoph's sharp humor is truly fun for geeks of all ages (even you, grown-ups). The user interface is beautiful and effortless: there are no words, only simple charcoal lines that shape themselves into various forms. Watch how an octopus's arm transforms into a mandolin and back again.

Although he is an illustrator, graphic designer, and author by trade, Christoph taught himself to code, and the iPad app isn't his first foray into tech. Check out the web-based games he built with New York Times multimedia editor Jon Huang for more illustrated, interactive play.

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