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In this food science activity, learners explore digestion and proteins by observing the action of meat tenderizer on luncheon meat.

In this neuroscience activity, learners conduct a simulation to demonstrate how multiple incoming signals influence the action of neurons.

In this activity (on page 1 of the PDF), learners make a "mini-globe" to investigate the causes of day and night on our planet.

In this activity, a lightbulb is placed in front of a concave mirror. The actual lightbulb is not visible to the viewer, but the viewer can see the mirror image of the lightbulb formed in space.

In this invention challenge activity, learners see how many objects they can grab with a homemade "bionic" arm.

Bones are stiff, which helps us lift heavy things and walk around, but they are also somewhat flexible, which lets them bend slightly.

In this activity about light and refraction, learners discover how a lens creates an image that hangs in midair.

In this activity, learners design a therapeutic agent to image and/or cure various diseases in the respiratory system.

This game uses a modified Uno deck to review concepts related to stem cell research and diabetes.

In this activity, learners observe how salinity affects the freezing point of water by making and enjoying ice cream.

In this activity, learners construct three optical illusion toys to examine how our brains play tricks on what we see.

You just ate a big meal and feel heartburn coming on. You take an antacid and feel better. Why? Heartburn is caused by stomach juice (an acid) burning the esophagus.

How can you make one shade of gray look like two? By putting it against two different color backgrounds! This activity allows learners to perform this sleight of hand very easily.

In this activity about how the body regulates blood pressure (page 117 of the PDF), learners make and compare measurements of heart rate and blood pressure from three body positions: sitting, standing

In this activity, learners make a Benham Top to explore visual illusions and optics.

In this activity, learners work in teams to construct human lung models from small plastic beverage bottles and balloons.

Some animals can swallow food whole, but humans have to chew. In this activity, learners will investigate what saliva does chemically to food before we even swallow.

In this activity, learners use molecular model kits to construct familiar molecules like lactose, caffeine, and Aspirin.

In this experiment, pairs of learners explore how cold water affects circulation. The mammalian diving reflex (MDR) slows circulation when the body is exposed to cold water.

In this activity, learners will investigate the sounds of the heart.