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In this hands-on engineering project, kids use two simple machines, levers and inclined planes, to construct their own pinball machines.

Students design and build their own parachutes in this hands-on engineering project.

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 ocean engineering activity, learners explore buoyancy and water displacement. Then, learners design models of deep sea divers that are neutrally buoyant.

In this engineering activity, learners design their own board games.

In this game (on pages 14-21), learners explore how each human being inherits genetic traits such as eye color.

This design challenge is an open-ended exploration of linkages, a group of parts connected by hinges, and the types of motion they can create.

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

In this activity, challenge learners to design a roller coaster ride for a marble using cardboard and other simple materials.

In this activity, learners design, build and test a model suspension bridge for sturdiness and strength.

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.

In this design activity, learners create a vehicle that can transport a load, like a favorite toy or as a recycled object, from the top of a zipline to the bottom using only gravity.

In this activity, learners build a kite out of paper, change it, and try to make it fly even better. With their new knowledge of kite making, students can then go on to create their own kite designs.

In this activity, learners will imagine the challenges and opportunities of asteroid mining.