- 4 pieces of yarn
- 2 glass jars
- Washing soda
- old plate
- 1.Twist 4 pieces of yarn to for a thick
- 2.Fill an old jar with very hot water
from the door.Then stir in some washing soda with a spoon.When
the washing soda is completely dissolved add more and stir again.
Keep adding and stirring till no more dissolves.
- 3. Put them somewhere warm where thy
will not be disturbed.
A stalactite and stalagmite will form
in a few days.
The water and soda solution will go along
the yarn and off the yarn. As it drips, the water turns into tiny
invisible drops which deposit crystals of soda. These deposits
grow layers just as thy do in limestone caves.