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In this activity, learners explore different ways to stack cups to meet a personal goal.

In this activity, learners build bridges and cantilevers in a series of "building out" challenges with straws and pins.

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

In this activity, learners use tinfoil to build and test their own boats - which designs will float, and which will sink?

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.

Build and test a scale model of a rainforest canopy walkway.

In this activity, learners build a bird that flies in place with help from a motor, wire, and some straws.

Learners explore the Bernoulli effect by building an airfoil (airplane wing) and making it fly.

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 Engineering Design Challenge activity, learners will use balloons to investigate how a multi-stage rocket, like that used in the Interstellar Boundary Explorer (IBEX) mission, can propel a sat

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

In this activity, learners build scaled-down structures and cantilevers in a series of "building out" challenges with bamboo skewers and tape.

In this experiment, learners design and build a model room in a shoebox and furnish it with tiny furniture.

Learners design, build, and test models of "dragon boats" made from up to three milk cartons.

This activity (on page 2 of the PDF under SciGirls Activity: Lift Off) is a full inquiry investigation into the engineering challenges of sending scientific sensors into space.

In this activity, learners are challenged to design, build and test a birdhouse that will stay cool in the sun.

In this activity about engineering, nutrition, and physical activity, learners design and build a healthy bone model of a space explorer which is strong enough to withstand increasing amounts of weigh

This activity (on page 2 of the PDF SciGirls Activity: Milk Carton Boat) is a full inquiry investigation into boat hull design.

In this activity, learners build large-scale structures and cantilevers in a series of "building out" challenges with garden poles and tape.

In this lesson, learners develop a robot arm using common materials. Learners explore design, construction, and teamwork, as well as materials selection and use.