Keith McCarthy

Wedges are simple machines used to split, lift, or hold an object in place. Children will discover how wedges perform jobs for people and how they make everyday life easier.

Pulleys are simple machines used to lift and move loads. Builders use pulley systems to lift tools or materials. Elevators use pulleys to move up and down. Kids will learn how pulleys make work easier and how they are often part of complex machines.

Levers are simple machines that make work easier. There are three different classes of levers. Students will learn what levers are, how the classes of levers differ, and how the construction of levers makes work easier.

The nervous system is a complex network of nerves that allows you to experience the world around you. Children will find out how nerves carry messages to the brain so that people can do things like jump and eat.

Winter winds blow snow at 35 miles per hour or more for at least three hours during a blizzard! Young readers will learn how blizzards form and why blizzard conditions temporarily shut down communities.

Hurricane winds spin around a central point called an eye. A hurricane's eye usually has calm weather and clear skies. Eager readers will discover how hurricanes form, move, and damage tropical areas.

We use wheels and axles several times every day. Young readers will learn how a wheel and axle work together, how they make work easier, and how they are used in larger, complex machines.