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Learners will explore the scientific mystery behind a disappearing group of trees by examining data and attempting to explain the decline.

This activity (9th activity on the page) about hearing demonstrates to learners the importance of having two ears.

In this activity, learners discover if carbon dioxide has an effect on temperature.

In this fun activity about spiders, learners build and design a spider from cardstock, straw, string, and pipe cleaners.

Professor John Endler traveled to Trinidad in the 1970s to study wild guppies. In this activity, learners take part in an online simulation of Endler's work.

Create an illusion where it appears that your hand has a hole in it. You'll see the results from when one eye gets conflicting information.

This activity introduces learners to Native Americans as people who depended upon nature in the past and continue to emphasize the importance of nature in the present.

In this optics activity, learners make a "light fountain" from a clear plastic bottle, flashlight, and other simple materials.

In this activity (on pages 13-16 of the PDF) learners investigate three mystery samples to see which one contains life. The three samples are sand, sand and yeast, and sand and antacid.

Make a big canvas of iridescent color with pvc pipe! In this Exploratorium Science Snack, you'll need to cut and assemble some PVC pipe, but the pay-off, the soap-bubble canvas, is big.

Align four color transparencies, each one a single color (cyan, magenta, yellow, and black), and see a beautiful full color image.

In this nutrition activity (page 2 of the PDF), learners will be split up into food groups (Fruit, Vegetable, Meat & Beans, Grain, and Dairy) and draw a picture of their favorite food from their g

In this activity, learners create a hearing based memory game that they can share with friends.

In this matching activity, learners play a game where they match words to the corresponding body parts of an antelope's basic anatomy.

In this activity, learners practice drawing 3D structures in two dimensions. Learners draw cube stacks from five different points of view.

The beautiful iridescent colors of a bubble in a can! With this Exploratorium Science Snack, create beautiful soap films on the open end of a can to see beautiful rainbows of color.

In this optics activity, learners work in pairs to explore how mirrors work. Learners use tape to mark the angles needed to see each other's reflection in a wall mirror.

This activity gets learners looking at 6-sided shapes in nature, including the cells of a beehive, as well as other shapes.

In this activity, learners will explore the insect life cycle by making a model.

This is a quick activity/demonstration that introduces learners to the concept of index of refraction. Learners place stirring rods in a jar of water and notice they can see them clearly.