Science Ninjas Valence Card Game For Kids – Fun Science Games To Teach Molecules, Chemicals, And Reactions – Simple Rules For Learning Chemistry Through Play – Chemistry Games - Educational GameWhatS Your Valence Number? Check Out Your Hand; Find A Set Of Valence Numbers That Add Up To 0; Coordinate The Color Of Each Element; Create A Molecule! In Valence, ItS That Simple And Players Find Themselves Learning Quite A Bit About Chemistry At The Same Time TheyRe Having Fun Playing A Card Game! The Brainchild Of Two PhdS In Chemical Engineering Along With A New York Times Best Selling Cartoonist On A Mission To Stimulate Scientific Curiosity,