What You Need:
- 2 plastic cups
- 6 teaspoons of baking soda
- 1 foot length of string
- 4 cups of water
- Fill each cup with 2 cups of water.
- Put 3 teaspoons of baking soda in each cup and stir carefully.
- Put one end of the string in each cup and let it sit for 1-2 days.
- Soon, you will see the little spikes on the string.
The water travels through the string and brings some of the baking soda with it, which creates the spikes.
Submitted by Teddie