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The answers to what screws are, why we need them, and many more are provided for curious readers. Screws help change... Read More >>
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Many scientists over the years have added to our understanding of electricity. As far back as ancient Greece when... Read More >>
If you ride a bicycle or a skateboard, or if own roller skates, you use wheels and axles. Readers discover the science... Read More >>
""Experiment with the states of matter and learn about the properties of solids, liquids and gases""-- Read More >>
Ideas introduced in this book discuss gravity, friction, electrical charges and more. This book is filled with projects... Read More >>
Readers learn all about pulleys--the simple machines that help lift heavy objects. Pulleys are also used to change... Read More >>
Wedges are very useful simple machines. Some wedges, such as axes and knives, help us split things apart. Others,... Read More >>
Experiment with the states of matter and learn about the properties of solids, liquids and gases -- Read More >>
ScienceWiz(R) Charge -- what a shocking experience! Build electrostatic devices that manipulate charge. Generate... Read More >>