Michael Dahl

Introduce young scientists to the basics of pulleys. Through charming illustrations and simple, easy-to-follow text, this nonfiction book introduces pre-readers to the benefits of these engineering marvels, providing everyday examples of a flagpole, a crane, an elevator, and window blinds. Award-winning author Michael Dahl delivers fun, fact-filled text for an engaging read-aloud or beginning read-alone. Includes hands-on experiments!

Describes some animals that move at extreme speeds when they jump, run, or fly. Some of the animals shown include a kangaroo, a zebra, a lion, and a bald eagle.

In the busy streets of Shanghai, three young people hide from a group of determined hunters who are searching for anyone born with dragon blood. The friends must work to hide their identities. Their greatest strengths could betray them, and turn them into prisoners forever.

Erik has nightmares that he can't even tell his best friend about. He sees his face in the mirror with fangs and lizard-like eyes. Could the dreams come true? And who are shadowy kids who follow him after school? They seem even more dangerous than the dreams.

An ancient curse sends a stone silo crashing across the countryside. Houses, barns, and cars are crushed in its path. The silo contains a giant scroll, sent by the foul Spellbinder to imprison the earth within its vast page. Even the mighty Librarian is overpowered by the Spellbinder's magic. This special 10th anniversary edition features never-before-published content, including a prologue and epilogue, while a glossary, writing prompts, and discussion...

Our greatest fears are brought to life in this collection of spine-chilling tales. An ordinary round of the Lava Game turns terrifying. An old lodge for loggers is haunted by a miserable ghost. A boy thinks he's home alone until he finds evidence someone else is there with him.

La rueda es una máquina simple. Una máquina es cualquier herramienta o aparato que facilita el trabajo. Las ruedas giran alrededor de un eje. Un eje es una barra de metal o varilla que pasa por el centro de la rueda. Las llantas de los carros, los camiones o los autobuses giran alrededor de un eje. Las ruedas nos permiten movernos más rápido de un lugar a otro. ¿Qué más pueden hacer las ruedas y los ejes?

The Page Turners, two powerful books from the Library of Doom, have fallen into the hands of an evil magician. He turns the books into two terrible tornadoes, to destroy the Librarian. But when the twisters suddenly head toward a small village, the Librarian must risk his life to stop them.

Siblings Kareem and Amina are dreading a night with their neighbor and babysitter Old Mrs. Heeley. The only good thing is, she always brings cupcakes. But when they go to get a tasty treat, Kareem and Amina find that the cupcakes seem to be devouring one another. Will Kareem and Amina be able to stop the madness before the zombie cupcakes take over? This collection of scary stories will bring you the answer to that question and many others, but you...

Una polea es una máquina simple. Las máquinas simples facilitan el trabajo, como levantar cargas pesadas o mover cosas de arriba a abajo. Las poleas nos ayudan a levantar cosas que no podemos levantar solos. ¿Qué más puede hacer una polea?