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This hands-on experiment will provide learners with an understanding of the issues that surround environmental cleanup.

In this activity, learners build water-propelled engines from soft drink cans.

In this activity, learners explore how engineers work in a team to solve problems.

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 will engineer their own weather vane. This activity includes step-by-step instructions with pictures and a "What's Happening?" section explaining how the activity worked.

In this engineering design challenge, learners build an air-powered spinning machine.

In this two part activity, learners work in pairs or individually to discover how vectoring the thrust from a jet engine affects movement of an airplane.

In this design challenge activity, learners build a machine out of cardboard that runs smoothly and dependably. Learners must be precise to make sure their component works properly.

In this engineering challenge, learners design and build a crane out of cardboard to see how heavy a load it can lift.

In this engineering activity, learners build a device (an anemometer) to measure how fast the wind is blowing.

In this engineering activity, challenge learners to design a car using only 3 straws, 4 Lifesavers™, 1 piece of paper, 2 paper clips, tape, and scissors.

This activity teaches combustion as the interaction of a fuel source and oxygen.

Make a model city happier with LEDs, circuits, motors, and batteries! Groups can think, discuss, design, and build what would make a community happy. Kids can work as part of a team or on their own.

In this activity, learners will make their own "ball bearing" with two jar lids, marbles, and some household supplies.

In this activity, learners build small animated toys that move.

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 friction and how ball bearings reduce friction.

In this activity, learners build a mini crank machine to make a bird "fly." This engineering activity introduces learners to automata, rotational motion, cranks and cams.

In this fun hands-on activity learners explore a simple machine: the lever. What happens to a load when you multiply the length of a lever? Find out here!

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.