MARION, Ill., (KBSI) — Young entrepreneurs in Southern Illinois have an opportunity to put their business ideas to the test during the fourth annual PMR Children’s Business Fair. Applications are open through Sept. 11 for the event, which will be held from 10 a.m. to 2 p.m. Saturday, Sept. 26, at Yummy’s in Marion. Children ages 6 to 17 can create and operate their own booths, selling products or services directly to the public while learning wh…