Which is the Best Children Insurance Plan to buy in India?

my little niece is 5 years old and my sister is planning to start investing for her education early ( i know this is too early but she wants to give her the best!). She is very creative and paints really well but then she wants to become an Astronaut like Kalpana Chawla 🙂

now-a-days there are a lot of child insurance plans coming up-all look the same to me. Was thinking if someone can tell which one is the best : Aviva Child Insurance, ICICI, Kotak, etc..