Avrom Litin hosts the hands-on demo table at the Illinois State Fair - 2015 (Photo: Milt Levenberg)

Illinois State Fair 2015 (Photo: Mllt Levenberg)

Premeir demonstrator Frank Salter (black shirt, center; Mark Twain local section), flanked by two assistants, leads a demo at the 2015 Illinois State Fair (Photo: Fran Kravitz)

Illinois State Fair 2015 (Photo: FranKravitz)

A volunteer from Southern Illinois University at the 2015 Illinois State Fair (Photo: Mllt Levenberg)

Illinois State Fair 2015 (Photo: Mllt Levenberg)

Illinois State Fair 2015 (Photo: Mllt Levenberg)

Illinois State Fair 2015 (Photo: Fran Kravitz)

Team University of Illinois - Springfield, led by Harsh Bapat (yellow shirt, center); Illinois State Fair 2015. (Photo: Frank Salter)

Team Southern Illinois University - Carbondale; Illinois State Fair 2015 (Photo: Milt Levenberg)

Team DePaul University; Illinois State Fair 2015 (Photo: Milt Levenberg)

Team University of Illinois - Urbana-Champaign; Illinois State Fair 2015 (Photo: Milt Levenberg)

Team Illinois College; Illinois State Fair 2015 (Photo: Frank Salter)

Team Monmouth College; Illinois State Fair 2015 (Photo: Frank Salter)

Team University of Illinois - Chicago (College of Pharmacy); Illinois State Fair 2015 (Photo: Frank Salter)

Team Illinois Valley Community College; Illinois State Fair 2015 (Photo: Frank Salter)

Team University of Wisconsin - Madison; Illinois State Fair 2015 (Photo: Frank Salter)

Team Wight College; Illinois State Fair 2015 (Photo: Frank Salter)

Team North Central College, led by Paul Brandt (right); Illinois State Fair 2015 (Photo: Frank Salter)