1 cup baking soda
1/2 cup citric acid
1/2 cup cornstarch
Sieve dry ingredients until you get a nice smooth blend.
2 1/2 Tbsp. sunflower or other light oil
3/4 Tbsp. water
EO vegetable or other natural colorant
1/4 tsp. Borax
Combine wet ingredients and borax in a jar, cover tightly and shake vigorously. Drizzle onto drive ingredients and blend thoroughly. Pack tightly into molds and slide out. Dry overnight.