What kind of Book That will Help Children on Study ?

Today we will talk Books for Children.

a Science, social, history, art or maybe some self defence books that good for children,
What u guys think that what kind of book will helping?

i got few Recommend,

For Indonesian,
i have read one book, that one really good for children undr 8 years old,
it full of colour, so children attention will be focused.
the name is Ensiklopedia

another one is a book called
"136 Fakta Menakjubkan Tentang Dunia'  (The Ultimate Book of Knowledge), A book that translated from english book.

These are few books that i have read when i was child,

so what u guys Recommend for some good books?