At the 2011 Houghton County Fair, youngsters line up to try running or dancing through oobleck, a sticky white substance that grabs your feet and holds you if you don't move fast. It's a favorite Mind Trekkers event. (File photo by Keweenaw Now)
Mind Trekkers is a regular at the Einstein Science Expo. This is the third year they have participated in the popular event, which draws thousands of children and families for a day of do-it-yourself science fun.