Playdoh

Steps

1. Combine flour, salt, cornstarch, and alum in a 2-quart glass bowl. Gradually stir in water and oil until almost smooth.
2. Microwave on high for 4 1/2 to 5 minutes or until the mix is very thick, stirring every minute (the mixture will be very lumpy).
3. Cool enough to handle. Knead on a countertop until smooth. Divide dough and knead in coloring as desired.
4. Store separately in airtight containers in the refrigerator. Keeps for months.