The mineral assistants from the Mercer County Library are keeping a busy schedule giving mineral presentations to students from several area schools. As the school year comes to a close, teachers are continuing to help students learn by encouraging hands on activities. Professor Strickland (above) is holding a quartz crystal ball while he explains about the different minerals in the gold mining pans. Celina Elementary students from Mrs. Bertke’s third grade class enjoyed learning about the minerals and their uses.