1. Mix ½ cup of school glue, 2 tablespoons of baking soda, and several drops of green food coloring in a large container.
2. Mix ¼ cup of vinegar and 2 teaspoons of saline solution in a small container.
3. Place both containers into a baking pan. Pour the vinegar solution into the glue mixture and stir a few times. The concoction will bubble as the baking soda reacts with the vinegar.
4. When the bubbling stops, mix about 3 more tablespoons of baking soda into the slime to make it easier to handle.
For younger kids: Use different food colorings to make goo of another color. Mix two shades to discover other colors: red + yellow = orange. Blue + red = purple.
For older kids: Know the science behind the slime. The boric acid and sodium borate in the contact-lens or saline solution react with the other ingredients to create the slime.
Text by Mary Sears
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