Salt and vinegar crystals are easy-to-grow non-toxic crystals that you can grow in a rainbow of colors. This crystal growing project is especially good for kids or beginners looking for quick and easy crystals.
OK you guys, I think I've fallen in love with another kids activity. These crystal stars are awesome! Any activity where I get to make something beautiful from bright rainbow colours, and I'm totally on board!
This is bismuth, a brittle metal with an iridescent oxide tarnish that produces rainbow colours. It's the most naturally diamagnetic metal in the world, which means it can create a magnetic field in opposition to an externally applied magnetic field.