Hollow Earth-Yang Yang Reading Scientific Stories-4 (Chinese Edition)

After finishing reading engaging stories, children will come up with a wealth of questions: How big is the centrosphere? Do tigers hibernate? Why snow can protect crops through winter? Answers to these questions can be found in ""Goats Knowledge Base"". Each base stores interesting knowledge. More than this! Each story is accompanied by two puzzles, which can not only help mind exercises but also enhance knowledge that have learned. Kids,come to read the stories,they will broaden your knowledge; the door of science world is open for you.