Grow a Salt Crystal on a Thread
A thread hung in salty water grows sparkling cubes over a few days. Setting it up takes twenty minutes, and after that the jar is tended like a vegetable patch.
What you need
- Glass jar
- Salt
- Hot water (poured by an adult)
- Cotton thread
- Pencil
- Spoon
How to play
- Pour hot water into the jar yourself, as this step is for the adult.
- Let your child stir in salt spoon by spoon until no more will dissolve.
- Tie the thread to the middle of the pencil and lay the pencil across the jar.
- Lower the thread so it hangs in the water without touching the bottom.
- Stand the jar somewhere warm where nobody will knock it.
- Look at the thread every morning and draw what has grown.
