In the studio the children experiment with the light, its position, the placement of their hands and their bodies. Using this space as a venue to discover aspects of their shadows builds their base of understanding ≈ ≈ For more inspiring pins: http://pinterest.com/kinderooacademy/light-shadow-play/
My daughter did this SCIENCE FAIR PROJECT. This would be very easy for kids to participate in. Just buy white carnations and add food coloring to the water in the tubes and watch the flowers change color. this would be very easy for high school and middle school kids. However, with elementary kids you risk them making a big mess if they were to spill the water while handling the tubes.
Coin Cleaning Children bring in “dirty” pennies from home and experiment with various ingredients: vinegar, salt, and ketchup, along with some ingredients that will not clean pennies well (such as water, flour, etc.) Children experiment with the different materials to find what cleans pennies the best. (Vinegar and salt together will clean pennies, and ketchup by itself will clean them.)