I’ve been so excited about this science project! Sam chose to do his science fair on the topic of crystallization. Did you know that you can make your own geode in 24 hours? It’s so cool!
It takes one full container of the stuff to make the experiment complete. Be warned: don’t buy the stuff in bulk for a class. The bulk stuff, called Alum, is actually Aluminum Sulfate which will NOT work. The stuff in the spice racks is Potassium Aluminum Sulfate. Hot water and food coloring make the final result really attractive.
Check out all the steps and the how & why at Steve Spangler Science. Even though this is for Sam’s science fair, we plan to make many of these this summer. Too fun!