人们是怎么知道地球是圆的的？你也许会说是哥伦布航海发现的，但其实远在古希腊时期就有了地球是圆的的理论。 从船上的?t望台能看到在甲板上看不到的远方，月相变化，时差的产生，不同地方的人能看到不同的星空等等，这些都表明地球是圆的。 这本英语原版科普绘本提供了丰富有趣的知识，穿越历史，进入太空，启发孩子观察、思考有关地球形状的现象与知识，培养孩子独立思考的精神。 书后有简单的小实验，引导孩子自己动手、观察。
Jack and Annie continue their quest for the secrets of happiness in order to save Merlin. This time, the Magic Tree House takes them to the one continent they haven't visited before: Antarctica. Illustrations.
Learn why fireflies flash their lights in this glow-in-the-dark book based on the hit PBS Kids show The Cat in the Hat Knows a Lot About That! Sally and Nick are making shadow shapes when the batteries in their flashlight conk out. Luckily, the Cat knows where they can get some light: from his friend Shimmer, a firefly! But it turns out Shimmer needs some help of her own: her friend Glimmer is in trouble. Fireflies call to each other using unique flashing light patterns, and Glimmer's pattern is all wrong. He needs help--fast! Can the Cat and Co. un-stick Glimmer from a giant spiderweb AND find enough light to put on a shadow show? You bet they can! With glow ink on every other spread and two sheets of glow stickers, this is a fun way to celebrate summer and to spark discussions on how different animals communicate!
Fly Guy and Buzz are back with another great nonfiction book! Award-winning author/illustrator Tedd Arnold brings nonfiction to life in this engaging nonfiction reader! During a visit to a space museum, Fly Guy and Buzz learn all about planets, space crafts, space suits, and even dirty snowballs （i.e. comets!）! With straightforward fun facts, humorous illustrations of Fly Guy and Buzz, and vivid photographs throughout, this book is sure to be a hit with budding astronauts everywhere! *HOLOGRAPHIC FOIL ON THE COVER!*
Learn all about insects with Fly Guy and Buzz! Fly Guy and Buzz are ready for their next field trip! And in FLY GUY PRESENTS: INSECTS they go outside to learn all about other insects like Fly Guy! With straightforward text, humorous asides, and kid-friendly full-bleed photographs throughout, young readers will learn lots of fun facts about all sorts of bugs. Award-winning author/illustrator Tedd Arnold really brings nonfiction to life!
Holidays Heroes（《美国的纪念日》）系列介绍了美国的纪念日、节日，以及与之相关的历史人物、社会事件等，文字简洁生动，图片丰富多样，适合小学生学习历史，了解美国文化，关注社会进步。免费赠送英语朗读音频，地道的英文表达帮助孩子扩充英语词汇量，提高英语阅读能力。 本册Let sCelebrateLaborDay（《劳动节》）讲的是有关美国劳动节的知识。所有美国人都喜欢庆祝劳动节，这是个周末，游行再加上野餐，非常欢乐。不过，在9月伊始的周一，也别忘了这个节日的真正意义：致敬美国所有的劳动者，尤其是那些为没有危险的工作环境和公平报酬而奋斗的工人们。
Jack and Annie present information about the universe, including our solar system, and briefly describe the history of space travel and of the science of astronomy.
