I Wonder Why the Wind Blows
<p>I Wonder Why the Wind Blows answers all sorts of tricky and fascinating questions about Planet Earth, such as "How cold is snow?", "How hot are deserts?", and "Where do rivers end?"</p>
I Wonder Why Stars Twinkle
I Wonder Why the Sea Is Salty: and Other Questions About the Oceans
I Wonder Why Volcanoes Blow Their Tops: and Other Questions About Natural Disasters
I Wonder Why I Sleep
I Wonder Why Spiders Spin Webs: And Other Questions About Creepy Crawlies
I Wonder Why the Sun Rises: and Other Questions About Time and Seasons
I Wonder Why Soap Makes Bubbles: and Other Questions About Science
I Wonder Why Planes Have Wings: And Other Questions About Transportation
I Wonder Why Leaves Change Color: And Other Questions About Plants
I Wonder Why Camels Have Humps: And Other Questions About Animals