Ada Twist is a very curious girl who shows perseverance by asking questions and performing experiments to find things out and understand the world.

"Working with simple household tools, kids can follow the step-by-step photographic instructions to exercise their design smarts, expand their 3-D thinking, and learn the basics of physics and engineering with activities that have real-life applications"--

A remote military research station in Utah sends out a frantic distress call, ending with a chilling final command: Kill us all! Personnel from the neighboring base rush in to discover everyone already dead - and not just the scientists, but every living thing for fifty square miles has been annihilated. The land is entirely sterile-and the blight is spreading. To halt the inevitable, Commander Gray Pierce and Sigma must unravel a threat that rises...

An old friend visits Zoey with a glowing seed pod. Zoey, Sassafras and Pip need to find out what will make this mysterious and magical plant grow.

Various diaries, letters, and other manuscripts chronicle the experiences of Octavian, a young African American, from birth to age sixteen, as he is brought up as part of a science experiment in the years leading up to and during the Revolutionary War. It sounds like a fairy tale. He is a boy dressed in silks and white wigs and given the finest of classical educations. Raised by a group of rational philosophers known only by numbers, the boy and his...