We all love Petting Zoo for the iPad with fantastic illustrations by Christoph Niemann. It's an interactive picture book where you have to touch, swipe and tap the animals to see how they react. The animals have really nice and not at all annoying sounds. The book make all of us laugh. Buy it here and read the story behind it here.
Especially Molly loves Moobaa - a really nice app for (very) small kids with cute illustrations by Pia Olsen. You simply have to tap the animals and each of them react with their respective sound. Watch the video to see how it works.
reasons my son is crying is really fun - especially on days filled with conflicts with the kids [Frida Viola].