LetterZoo is an android puzzle developed by Hachiko. As per the developer the app is a jigsaw puzzle designed to familiarize children with the alphabet using names of animals starting with each letter.
The app has an animal for every letter in the English alphabets. The app let your children learn about animals and alphabets at the same time. The app is not just names and alphabets but also has picture associated to make your child understand and remember better. When the puzzle is completed the app will narrate the name of the animal.
The app is 27MB in size and is free to download from playstore. There are many similar puzzle apps out there on playstore, but this one is worth mentioning. It has very professional interface and beautiful graphics and your child will like it.