The first experiment Hannah did was to grow a crystal tree - this was effective, the crystals started to grow the same day and two days later she had a beautiful sparkly tree!
She is also making crystals from limestone and vinegar,
This one takes a bit longer but is looking very promising - Hannah was fascinated by the carbon dioxide bubbles coming from the stone!
Lastly she made a salt water solution and is making salt crystals on a paper clip suspended in the solution. She already has small crystals forming and is going to see how large a crystal she can make.