Mix sugar and cornstarch in
Heat until mixture begins to thicken, stirring constantly; cool.
Divide the mixture equally into 3 containers, then add food
coloring, 1 color per container, until the mixtures reach the color
Add 3 heaping tablespoons of each color to a heavy-duty
zipper-close bag. Seal the bag and tape it closed.
Have the children knead the
bag, mixing the colors into a rainbow stew. these can be hung in a
window for display, or stored in the frig for play later.