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In this activity, learners are challenged to design and construct a trophy for prize-winning sports equipment.

In this math-based activity, learners will experiment to find how height and angle affect spatter and then use this knowledge to solve a crime.

Scientists use enormous wind tunnels to test the design of planes, helicopters, even the Space Shuttle.

In this design challenge activity, learners add headphones to a previously built instrument (see "Build a Band" activity) to make it easier to hear.

Learners create beautiful fluid motion. They explore fluid dynamics, surface tension, solubility, and buoyancy while mixing liquids together.

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

In this drawing/mapping activity, learners design plots of land while incorporating positive strategies for improving water quality.

Learners conduct two activities to investigate two properties of liquids: density and viscosity. In a clear container, learners stack 7 different liquids which will layer according to their density.

This activity (on page 2 of the PDF under SciGirls Activity: Music and Sound) is a full inquiry investigation into sound frequency.

In this activity, learners design and build a simple wind vane —one of the oldest kinds of weather tools— and use it to show wind direction.

In this activity, learners make balloon models of disease-causing bacteria.

In this archaeology activity, learners consider ways in which excavating an underwater site is different from excavating a terrestrial site.

In this activity, learners simulate what happens to a human spine in space by making Sponge Spool Spines (alternating sponge pieces and spools threaded on a pipe cleaner).

In this three/four-day lesson, learners calculate perimeters and areas and draw the castle plan to scale.

Learners smell balloons filled with different scents to guess what's inside. From this, they infer the presence and motion of scented molecules.

Build your own Mini Mini Golf Course and learn about hands-on building and design, basic circuitry, motion modules and more!