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What causes sound? How does sound travel? Sound begins when matter vibrates. Without this vibration sound could not move and nothing would make any noise. Starting with tiny molecules, this book explains the main concepts of sound and furthers understanding through a series of easy-to-do experiments that will appeal to readers of all ages.

Biography of Benjamin Franklin, a great American inventor, statesmen and diplomat as well as one of the founding fathers of the United States of America. In graphic novel format.

¡Para que comer bien sea siempre un placer! ¡A comer! Niños y niñas de todos los rincones del mundo nos invitan, a través de sus historias, a aprender a comer bien. Nos mostrarán cuál es la pirámide alimenticia correcta, qué tipo de comida nos da energía, cómo comen las personas en otros países y muchas cosas más. ENGLISH DESCRIPTION Eating healthy should always be joyful and entertaining! Let’s eat! Boys and girls from all over the world share with us the joys of eating healthy and through the stories they share, invite us to do the same. They will show us what the correct...

History is full of unsolved crimes, mysterious disappearances, and strange sightings. Readers will discover some of the most well-known mysteries in history--including Amelia Earhart, Big Foot, and the Salem Witch Trials--in this fascinating, Spanish-translated nonfiction book. Featuring detailed images, intriguing facts, and informational text in conjunction with a glossary of terms and an index, readers will be enthralled from beginning to end! This 6-Pack includes six copies of this title and a lesson plan.