Remember those science experiments you used to do with your kids: like writing invisible messages with lemon juice, making magic bubbles with vinegar and baking soda, and creating mouth lightening with wintergreen Life Savers? Some kids took it to heart and grew up to become research scientists and discover some pretty remarkable stuff. This week Jim Vartuli, holder of numerous exclusive patents, joins Einstein’s Circle to talk about some of the stories behind discoveries that led to inventions of some very “cool” things.