Young inventors in Knoxville will continue to show off their ideas this week. Fifth grade students at Northstar Elementary showcased their inventions on Friday and the forth graders will have their chance Wednesday. The competition is part of Invent Iowa which is run by the Belin-Blank Center at the University of Iowa. The program is in its 24th year and encourages students to think creatively and solve problems through the invention process. Winners of the local competition can then move on to the sub-statewide contest at Iowa State University on April 16th.