> Another fun "magic" trick is to mix the colors for a secondary color demo on > the overhead projector with the lights out and using water and food colors on > the wonderful organic water shapes....big is so cool!
???? - You do mean to put a glass pie plate or plastic or something over
the glass on the overhead don't you? Or do you not have to?
I used to do a similar effect with a glass pie
plate and eye droppers with water and Wesson oil and thefood colors. It is
like a light show lava lamp! But it did not work when kids helped, the
oil was a a bit of a mess all over the projector when done. >