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The goal of this activity is to build a miniature bobsled that is either the fastest or the slowest. Learners use recycled materials to design, build, and test their bobsled on a bobsled track.

Learners play the role of materials engineers as they test the flexibility of different materials.

In this activity about water solubility and density, learners use critical thinking skills to determine why water can dissolve some things and not others.

In this "Sid the Science Kid" activity from Episode 109: The Perfect Pancake, learners make applesauce to explore irreversible change.

Why does milk make some people sick? In this activity learners explore this question and explore the chemistry of milk, and our bodies!

This activity was designed for blind learners, but all types of learners can utilize it to investigate volume, mass, and density.

In this activity, learners take measurements and create charts to learn about the size of dinosaurs and their relative scale to humans.

In this activity, learners can observe chaotic motion. A magnet tied to a piece of string makes a pendulum, which swings over three sets of fixed magnets.

In this activity, learners make their own solar oven to bake s'mores and learn about how solar energy is absorbed on Earth.

In this chemistry activity (page 6 of the PDF), learners observe a chemical change. Learners write and reveal a secret message using edible ink.

This is an activity (on page 2 of the PDF under Bone Regrowth Activity) about the two main components of bone - collagen and minerals (like calcium) - and how they each contribute to its flexibility a

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

In this physics activity, learners experiment with pulleys and find that they can decrease the effort needed when using a pulley to lift or move different loads.

In this water activity, learners test which objects float and which sink. Learners discover that objects behave differently in water.

This laboratory exercise is designed to show learners how DNA can easily be extracted from onion cells using simple materials.

Doctors often send a sample of blood to a lab, to make sure their patients are healthy.

In this chemistry activity, learners will test the pH of various foods and household substances using cabbage.

In this physical sciences activity, learners explore how forensic investigators collect prints from a crime scene. Learners make hand impressions in damp sand and analyze the patterns they observe.

In this activity related to Newton's Laws of Motion, learners build a boat powered by a propeller in the air.

In this water activity, learners explore how water drops behave on different surfaces.