University of Colorado chemistry Professor David Nesbitt will present the final CU Wizards program of the semester, "Chemistry is Fun," on Saturday, Dec. 26. The program will be in the Cristol Chemistry and Biochemistry Building, room 140, at 9:30 a.m. Nesbitt will use exciting visual displays and experiments to illustrate the basic concepts of chemistry. He plans to produce several explosions, show how liquids mix or don't mix, demonstrate the effects of temperature on chemical reactions and explain how fireworks get their colorful glows.