Ed Kloehn sets up amethyst geodes for sale at the Rock Our World display at Tucson Electric Park's Gem & Mineral Show, 2500 E. Ajo Way, in 2005. Don't expect your kids to find geodes this big for $5. 

The hands-on Junior Education exhibit at the TCC is a great spot for educational fun where children can participate in experiments and demonstrations set up by University of Arizona geosciences students.

2-6 p.m., Feb. 10

10 a.m.-6 p.m., Feb. 11

10 a.m.-5 p.m., Feb. 12


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