I remember when I was in junior school we learnt how to make crystals. The set up so easy and it was the topic of conversation over the course of the week as we all watched the crystals form and seemingly grow before out eyes.
Recommended age: 4 years+
(Active supervision is required on all my activities)
- 2 x jars or glasses
- String or wool (as long as your arm)
- 2 x paper clips
- Very warm water
- Bi-Carb soda or baking soda
Begin by filling the glasses with warm water and stirring a teaspoon of Bi-Carb soda into each. Continue to add teaspoons on Bi-Carb soda until it will not dissolve any more.
Slide a paper clip onto each end of the piece of wool or string. Don’t wrap it around the paper clip (as shown) as it will struggle to sink. Just slide it on so that it acts as a weight and keeps it in place.
This is what it will look like after a week!
If you follow this method of making crystals you will possibly find that the glasses themselves develop crystals. Don’t worry, Bi-Carb soda will not cause any damage. These glasses washed up bright and sparkling from the Bi-Carb soda.
Would your children enjoy this type of science activity?
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