Makaela and Tobias wrote these wonderful stories about it:
My CrystalOn the weekend I made crystals that look like the moon in the sky with lots of stars. They are like blue hedgehogs dancing in the moonlight. My crystals shine like a thousand stars in the sky. They are like snowflakes falling on me. They look like lollies covered in sugar. Tiny blue lights shining up at the sky. I made my crystals out of magnesium salt and for a little bit of colour I added food colouring.
Makaela's CrystalIn the weekend Makaela made some crystal out of hot water, magnesium salt, and blue food colouring. The blue colour makes the crystal stand out lots. The crystal looks crispy and shiny. It is thin, spiky and sparkles when the light hits it. I would like to have a go at making a crystal.