A trip to the Petting Zoo for iOS (pictures)

The app contains drawings, each of which constitutes as a chapter. However, there is no overall narrative story that takes place. Instead, it simply contains 21 of Niemann's hand-drawn animals that each react in different ways to five swipe movements (up, down, left, right, and center tap).

Swipe down and this Dachshund will start break dancing his little Dachshund heart out.

Relaxed and fully composed, you can help this elephant wash itself in a bath.

Though it looks menacing, this crocodile's teeth can be played similar to a harp. Just try not to prick your finger.

Don't worry, the giraffe doesn't bite. He only wants to clean your mobile screen from the inside out.

Swipe and tap this little guy's way through all three teacups.

You can tap different parts of this porcupine to grow out his spikes and play some notes.

This dainty butterfly unexpectedly shows the jumping cat exactly who's boss.