The ACS Chem Clubs Web site offers an assortment of ideas to spice up your lesson plans near Halloween. There are many recommended demonstrations including using a Jack-O-Lantern with different color flames or smoke coming out of it. There are activities for dressing up like elements and testing candy just to mention a couple.
There are also scientific articles that discuss the aroma and flavor of chocolate, molecules that create foul-smelling odors during compositon of animals and more.
ACS Chem Clubs