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In this activity, learners explore the concept of how aerospace engineering has impacted sports, specifically exploring the design of golf balls.

Learners design and create musical instruments from common objects; their challenge is to create an instrument that can make three different tones.

In this activity, learners explore how watermills have helped harness energy from water through the ages.

In this activity, learners explore the design of rubber band powered cars. Learners work in teams of "engineers" to design and build their own rubber band cars out of everyday items.

In this activity, learners explore the history, design and motion of spinning tops. Learners work in teams of "engineers" to design and build their own tops out of everyday items.

In this design challenge activity, learners build a rubber band-powered rover that can scramble across the room.

In this activity, learners explore how the pendulum has been a reliable way to keep time for centuries.

In this activity, learners explore how engineers work to solve the challenges of a society, such as delivering safe drinking water.

In this online Flash game, learners test their engineering know-how, moving a collection of mechanical parts onto a board to make complete a system of parts that will move a ball from start to finish.

Learners construct a rocket from a balloon propelled along a guide string.

In this activity, learners determine whether thermal energy can be used for work.

In this design challenge, learners build a boat that paddles itself using a rubber band as its power source.

In this activity, learners explore the concept of force and how pulleys are used in everyday life to make work easier.

In this activity, learners explore the concept of how brakes can stop or slow mechanical motion.

In this activity, learners explore how a hydraulic pump works. Learners work in teams to design and build a unique water fountain that employs a hydraulic pump.

In this design challenge, learners will create their own roller coaster using household objects for the track and a marble or small ball as their cart.

The goal of this activity is to build a miniature bobsled that is either the fastest or the slowest. Learners use recycled materials to design, build, and test their bobsled on a bobsled track.

In this design challenge activity, learners build a shock-absorbing system that will protect two “astronauts” when they land.

In this activity, learners review the history of gumball machines and explore potential and kinetic energy, while working in teams to build a gumball slide.