Mark Weakland

DO-4U and his friend, HEV-E1 explain the nature of forces and motion, including friction, inertia, and magnetism.

"Scooby-Doo and the Mystery Inc. gang have seen their share of ghosts and monsters. When Shaggy and Scooby want to learn all about vampires, the gang has all the answers. Join Scooby and the gang as they unmask the truth behind vampires!"--Provided by publisher.

"The popular Scooby-Doo and the Mystery Inc. gang teach kids all about subtraction"-- Provided by publisher.

The world is full of microscopic creatures. But who would have thought that we needed these tiny creatures to digest the food in our bodies or make the oxygen we need to breathe? Get out your microscope, and get ready to examine the microorganisms we can't live without.

Does a towering sunflower fit inside a tiny seed? Where do seeds come from? What makes them grow? Discover the amazing science of seeds in Seeds Go, Seeds Grow.

What makes a bubble float? Are the bubbles in your soda the same as the bubbles in your tub? What makes a bubble pop? Discover the wonder and science of bubbles in Bubbles Float, Bubbles Pop.

What's the matter? Everything's the matter!! Get it? If you don't get this joke, you need this book! It'll teach you everything you need to know about what makes up your body, the world, and the universe. The answers will matter to you!

"The popular Scooby-Doo and the Mystery Inc. gang teach kids all about even and odd numbers"-- Provided by publisher.

What makes things move, but cannot be seen? It pushes and pulls but remains invisible. Learn about the magic of magnetism! Then try a hands-on experiment that will attract kids to science.

Two boys learn to be the heroes of their own adventure. In pursuit of "the world's most awesome tree house," best friends Matt and Jerry spend the summer after sixth grade hauling wood up the hillside of their Pennsylvania hometown. The boys' freedom is tempered by trying to avoid the attention of Trio Diablo, a menacing gang of teenagers. Their summer soon changes when they venture into the hollow on the other side of the hill. The friends stumble...