Children's Books are a very important part of language learning for Kids and these are some of the best I came across in my years working in a children's book department. Reading to the children and monitoring sales. 

 

 The Gruffalo

One of the all time favourite picture books. Children aged 3-5 just love it.

 

The Bad Beginning A Series of Unfortunate Events, Book 1

One of the most popular chapter books to come out in recent years and it's good. 8-12 year old kids are likely to enjoy it.