Cedar Valley Rocks and Minerals Society presents its 54th show featuring Crinoids - Our State Fossil ??. Programs, demonstrations, display, silent auction, kids activities and lots of items for sale. Check website for program schedule. Profits contribute to our scholarship program, Sat. Mar. 24 - 8:30- 6:00. Sun. Mar 25 - 9:30-4:00. Adults $3, Students (12-18) $1, Children under 12 and youth groups with leaders are free.