描述
-- Simple experiments help children test and observe basic scientific principles.
-- Filled with fascinating information that kids want to know about the world they live in.
-- Offers fun and facts for the entire family.
-- Colorful photography and clear explanatory texts.
-- Filled with fascinating information that kids want to know about the world they live in.
-- Offers fun and facts for the entire family.
-- Colorful photography and clear explanatory texts.