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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.

Children explore the concepts of big and small in the world around them, from big round pancakes to tiny little seashells.

Enseña a tu dragón a ser paciente. Un adorable cuento infantil para enseñar a los niños sobre las emociones y el manejo de la ira. (Spanish Edition)

Using helpful charts, graphs, informational text in conjunction with vivid images and intriguing facts, this engaging, Spanish-translated title allows early elementary readers to explore the ecosystem, plants, and animals of the deserts around the world.