On a rainy Saturday we headed to COSI! The boys just finished preschool and kindergarten and summer is off to a fast start. COSI has many exhibits, and since we're members, we usually only visit one or two each time we visit. Somehow we have completely missed the gadget area there, which turned out to be a hit. At the gadget cafe, we even ordered a science experiment where we learned about saltwater. Thanks COSI!