Materials

• 1 cup baking soda
• 1/2 cup white vinegar
• 1/2 cup cornstarch
• 2 Tbsp. light corn syrup
• Liquid or gel food coloring (Gel provides more vibrant colors, but is harder to mix in.)
• Mixing bowl
• Ice tray
• Toothpicks

Instructions

1. In a large bowl, mix the baking soda and vinegar together. Pour the vinegar slowly to minimize the effects of the chemical reaction that the two have. 
2. Add in the cornstarch and corn syrup.
3. Mix everything together slowly until the mixture is smooth.
4. Pour the mixture evenly into the ice tray.
5. Add colors into the compartments and stir with toothpicks. The more liquid coloring you add, the longer the mixture takes to dry.
6. Let dry overnight. If you use deeper trays than an ice tray, it will take longer to dry.
7. Use the “paints” like normal watercolors with water and brushes.