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In this activity, learners build unique yo-yos, which spin round and round without moving up and down.

Learners use shop tools and various materials to construct a magnetic spinner and a compass.

This marine biology activity (on pages 11-17) introduces learners to kelp (seaweed) forests that grow in the ocean and are home to many species of sea animals.

In this activity, leaners explore building techniques by recreating the story of The Three Little Pigs.

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

In this activity, learners discover that some things only stand up while they are spinning.

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

In this "game," learners explore and relate the evolution of stars to a Navajo creation story. The story is written on a series of cards, which are laid on a table as the story is told.

In this activity (page 4), learners work in groups to plan and build large structures using recyclable materials they have brought from home.

In this activity, learners make their own Sun tracker to explore how ancient civilizations around the world studied the Sun.

In this activity, learners separate the protein from milk and and use it to make their own glue.

Learners explore capillary action in plants (such as plants ability to move water from roots to leaves) in an investigation called Paper Blooms.

In this chemistry activity, learners use thin layer chromatography to determine the molecular composition of different markers.

In this activity with several mini experiments, learners explore the chemistry that helps scientists learn about the environment and how they can help save it.

In this group activity, learners act out key stages of the "ocean carbon cycle" (also known as the "carbonate buffer system") through motions, rearranging blocks and team tasks.

In this activity, a group of learners work collaboratively to design and construct a paper model showing the evolution of an environment through multiple stages, from prehistory through the modern cit