In bowl, mix 3 tablespoons cornstarch and 1 tablespoon flour. Gradually stir in 3/4 cup Karo corn syrup and 1/4 cup water until smooth. This amount will make up 4 children's faces. Divide mixture between 4 paper cups. Color 3 batches with food colors of your choice (1/2 teaspoon liquid or 1/4 teaspoon paste for each batch). Leave 1 batch untinted.
For additional colors, prepare more makeup. Separate tissues into single layers; tear lengthwise into 2-inch wide strips. Using swabs or brush, paint generous coat of untinted mixture on forehead; place strip of tissue over area; pat firmly with fingertips. Brush on more of same mixture to cover any dry spots on tissue. Continue painting rest of face, one area at a time, and covering it with tissue. Don't paint eyelids or around eyes. Let dry about 15 minutes; time depends on temperature and humidity.
Stir colored batches before using. Paint on 1 color at a time as desired. Let dry slightly before using another color if you want them to blend, or let dry completely if you don't. To speed process, use hair dryer on air setting.
For deeper, smoother, candy-color effect, use several coats of same color (allow to dry slightly between coats).
TO BUILD UP EYEBROWS, nose or chin (or for beard) apply cotton to damp, untinted mixture. Paint with more of the same. Cover with tissue and paint desired color.
FOR GHOULISH EFFECT, dust made-up face with flour.
FOR WARTS, stick on Puffed Wheat cereal with untinted mixture, then coat with layers of mixture-soaked tissue. Paint desired color.
TO REMOVE MAKEUP, wet face, then gently peel tissue away. Wash face with warm water.