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In this activity, learners will construct a measuring device (snake "string") to improve their observation skills.

This activity (page 2) draws upon a familiar, computer-based concept related to visual resolution: pixilation.

In this activity, learners sort different natural phenomena into categories (they occur on Earth, on the Moon, or on both), and then model how energy moves during a quake using spring toys.

In this activity, learners will experiment with the physics of flight by making a gliding contraption with strange looking wings. The activity explores flight with connections to the natural world.

In this activity, young learners (2 years and up) explore tree structure and biology. Tree products are explored by painitng with fruit.

Create an instrument that you don't play--you just listen to it through tubes of various lengths.

In this version of a Sumo wrestling bout, players use mathematical skills to move their opponent's counter beyond the track and "out of the ring." Learners reveal playing cards and the player with the

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

The Let's Do Chemistry "Build a Battery" activity lets participants learn how batteries work and how materials behave, change, and interact by building their own simple battery out of metal and felt w

In this activity, learners use heat to separate zinc and copper in a penny. This experiment demonstrates physical properties and how physical change (phase change) can be used to separate matter.

In this chemistry activity (on page 2 of the PDF), learners make a layered drink with liquids of different densities.

In this activity learners will explore the concepts of density and matter in their quest to answer one simple question-will it sink or will it float?

In this activity, learners recreate a method of detecting and correcting errors in computers called 'parity'.

In this activity, learners explore the relative size of the Sun and Earth as well as the distance between them.

Focus sound through a balloon! In this Exploratorium activity, you'll use dry ice to create a balloon that's a sound lens.

In this math activity, learners play a game and use a variety of strategies to solve a hidden number problem (or missing factor). Learners practice their number and operations skills.

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

In this activity, learners play a card game that explores different size scales--macro, micro and nano.

In this demonstration, learners observe vinegar and baking soda reacting to form carbon dioxide (CO2) gas.

In this matching activity (3rd activity on the page), learners use their sense of smell to match pairs of opaque containers filled with various smelly items like orange peel, roses, or moth balls.