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Learners measure irregularly shaped bones using a variety of measurement methods and tools. Then, they measure again using standard conventions and metric tape measures.

In this activity (page 105 of the PDF), learners measure heart rate and blood pressure and learn how to obtain consistent measurements during repeated tests.

Build a hydrometer (measures the density of a liquid) using a pipet or eyedropper.

In this activity, learners create a map of a hidden surface using a "sounding stick" -- a technique similar to how underwater maps were once made.

Yes, you can weigh your car by figuring out your wheel's tire pressure combined with the "tire's footprint." You'll need someone with a car, driver's license, and safety in mind.

Learners use a variety of beans to represent a variety of species, and scatter these beans over a large piece of paper representing the environment.

In this activity (26th on the page), learners construct an easy-to-build device and test motor learning.

In this activity, learners investigate how geometry plays a role in perspective.

In this activity, learners work in groups to design a parachute out of household items that keeps an egg secure when dropped from a certain height.