Spectators and competitors watch their cars race Monday night during a Race Car Live Challenge as part of the Science, Technology, Engineering and Math Mercer County Critical Thinking Showcase at St. Henry High School. Elementary, middle and high school teams of four to six students used everyday household items to make a race car. St. Henry High School and Middle School teams won in their respective divisions and Parkway Elementary School won its division. St. Henry High School also won the overall STEM contest.