For More Information: Lynn Brockmeyer, WPT publicist, 608-263-3364, [email protected] Erik Ernst, WPT promotion manager, 608-265-3853, [email protected] This year's holiday special on Wisconsin Public Television (WPT) from University of Wisconsin-Madison Chemistry professor Bassam Z. Shakhashiri will be a compilation of the best moments from the show's past 41 years. The Best of Once Upon a Christmas Cheery in the Lab of Shakhashiri airs 4:30 p.m. Friday, Dec. 23 and 8 a.m. Sunday, Dec. 25 on WPT. Over the years, Shakhashiri has delighted viewers of all ages with the sights and sounds of science — bangs, booms and liquids that change color. His guests have included Bucky Badger and Santa Claus. WPT is a service of the Educational Communications Board and the University of Wisconsin-Extension. Wisconsin Public Television is a place to grow through learning on WHA-TV/DT, Madison; WPNE-TV/DT, Green Bay; WHRM-TV/DT, Wausau; WLEF-TV/DT; WLEF-TV/DT, Park Falls; WHLA-TV/DT, La Crosse; and WHWC-TV/DT, Menomonie-Eau Claire.