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In this engineering activity, learners explore simple machines and then build cardboard automata using cams.

In this design challenge, learners will create wind-powered contraptions to transport a load, such as a cupcake or another small object, and test to see if they work.

In "Chemistry is Colorful" learners explore different materials through paper chromatography.

In this design challenge, learners design a storm drain cover that catches litter to protect waterways to learn about how local actions can have system-level effects.

In this activity, learners build a simple solar oven out of household materials to melt chocolate and marshmallow between graham crackers--known as s'mores.

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