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Learners combine different plant solutions -- made from fruits, vegetables, and flowers -- with equal amounts of vinegar (acid), water (neutral), and ammonia (base).

In this activity, learners will test soil content using their sample, some water and a container that seals.

In this online activity about anatomy, learners will drag and drop pieces of the heart into their proper positions and explore what function each part of the heart has.

In this activity, learners investigate parallax, a method used to measure distances to stars and planets in the solar system.

If you had a long tube with a 5 millimeter wide slit, would you see the entire Golden Gate Bridge?

Learners mix a solution of luminol with hydrogen peroxide to produce a reaction that gives off blue light.

Which one of your eyes are dominant? Do they act independently or are they equally "in control?" This activity explores how your eyes work (or don't work) together.

We're told from a young age that we have 5 senses, but we have many more. One of which is our awareness of our own body part's orientation and position.

Learners compare the properties and solubilities of Styrofoam (TM), ecofoam packing peanuts, and popcorn. First, the solubility of each substance is tested in water.

We listen to stereo music systems, tv's, and radios because it simulates being where the sound originates.

In this activity (13th on the page), learners complete a simple illusion trick to see through their own hand.

Known as the waterfall effect, this activity demonstrates adaptation in our visual system.

Exponga estos pósteres en el salón o déjelos donde los chicos los puedan explorar. Los chicos buscan las respuestas en libros de consulta o en línea.

In this activity about vision and optical illusions, learners conduct a simple test to demonstrate how our eyes create "afterimages." Learners stare at a black cardboard bat for at least 30 seconds an

In this activity, learners create an optical illusion by spinning two attached cups. A round ball seems to magically appear when the cups spin.

We don't normally view people upside down and so our brains aren't accustomed to it.

This science activity demonstrates the dominant eye phenomena. What does your brain do when it sees two images that conflict?

In this optics activity, learners use water to make a coin "appear" and "disappear." Use this activity to demonstrate how light refracts and introduce light as waves.

Sound can travel through a variety of media.

In this activity, learners create a water prism to break light into the seven colors of the rainbow.