This activity (aka "snack") provides instructions for studying the lingering afterimage that often remains after viewing a bright light source. 

When you view a slide show or a movie, where is the picture? This activity (aka "snack") provides instructions for investigating light and human vision using a pencil and a slide projector.

Need more practice with fractions? This interactive site makes understanding fractions more fun.

 This activity (aka "snack") provides instructions for making a bicycle wheel into a giant gyroscope.  

This activity (aka "snack") provides instructions for using familiar kitchen items (steel wool, pie pan, styrofoam plate)

 This activity (aka "snack") provides instructions for using gelatin and a laser to study reflection, refraction, and color transmission.

This activity (aka "snack") provides instructions for building red, blue, and green spotlights that combine to produce white light and cyan, magenta, and yellow shadows.

This activity (aka "snack") provides instructions for repeating Galileo's famous experiment showing that objects of different mass fall at the same rate. Galileo predicted that heavy objects and light ones would fall at the same rate because the resistance of

This activity (aka "snack") provides instructions for building a balancing stick (a wooden dowel with lump of clay on one end) to explore center of gravity and angular momentum.