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.
Bismuth Geode/ bismuth that has been GROWN and cooled in an eggshell! Apparently bismuth is one of the easiest crystals to grow yourself. Bismuth does not naturally occur in geode form. What fun to create your own dragon's egg! http://www.artofncook.com/