1/2 c. cornstarch
3 c. cold water, divided
Food coloring (red, yellow, green, blue, or one of the combinations below)

Place cornstarch in large bowl. Blend in 1 cup water. Add remaining water. Microwave at high 8 to 9 minutes or until thickened, stirring every 2 minutes. Pour 1/2 cup thickened mixture into each of 6 small bowls. Add desired food coloring. Cool before using.

No of drops food coloring required for desired color.

Blue-Green, 1 green, 3 blue.

Orange, 2 yellow, 1 red.

Purple, 3 red, 1 blue.

Violet, 1 red, 2 blue.

Yellow-Green, 1 green, 12 yellow.