These borax crystals are SO COOL and beautiful! Use pipe cleaners and a simple borax and water solution to grow your own crystal gems. This is such a pretty and fun science experiment! Borax Crystals Making borax crystals is such a cool science experiment. It takes a bit of patience to let the crystals grow, but the results are amazing! Borax crystals are a great chemistry experiment showing the recrystallization process. Kids can see how molecules react to different temperatures, and literally see changes in matter as the crystals form. Try growing your own borax crystals in whatever shape or