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This lesson focuses on how materials behave differently as their surface area increases.

In this activity, learners build a machine made of craft sticks to multiply the levering motion of their hands and create a device that bends and extends.

In this engineering design challenge, learners animate a facial expression and make a machine (zoetrope) that plays the animation back.

In this activity, learners build a sled kite that models a type of airfoil called a parawing.

In this activity, learners build a figure that moves and "comes to life" when they pull its string.

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

How does a green roof, or roof covered by plants, affect the temperature of the inside and outside of a building? Learners design and build houses to find out the answer.

In this activity (located at the top of the page), learners make an easy river strainer and see what they can catch.

This is an activity (located on page 4 of the PDF under What's Nano? Activity) about size and scale.

In this activity, learners conduct an experiment to explore how water flows up from a tree's roots to its leafy crown.

This lesson focuses on how nanotechnology has impacted our society and how engineers have learned to explore the world at the nanoscale.

In this activity, learners explore the concepts of structural engineering and how to measure the critical load, or the maximum weight a structure can bear.

In this activity, learners will observe a deceptively simple process: a burning candle.

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

Learners will understand the relationship between climate change and sea-level rise.

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 activity, learners explore the devices used over time to measure changes in temperature.

In this activity, learners investigate the relative growth of lengths, areas, and volumes as cylinders are scaled up.

In this activity, learners will explore the water cycle by creating a small atmosphere.

In this engineering design challenge, learners make a bird and then control its flight with attached strings.