Bhoomi’s story space is a good read for kids starting with the concepts of solar system and universe. It’s a part of five book series by Tulika Publishers presenting the different elements of nature in a fun story format.
Bhoomi’s Story Space
Pipsqueak Hears Echos
Pratham Books quality of content is top class. One such gem of a book from Pratham books is Pipsqueak Hears Echos.