21 March 2015. Giddings and SIO graduate students Julia, May-Linn, Sasha, Erica, and Shantong, joined with the Tijuana River National Estuarine Research Reserve (TRNERR) team to present hands-on experiments to kids and parents at the San Diego Science EXPO Day. It was a fun filled day with exhibitors presenting hands-on STEM experiences ranging from operating and building robots to making concrete. There was even math rap and dance performances! The TRNERR group had a demo allowing kids to dig through fake mud cores to search for the various creatures that live in the estuary marsh and microscopes to check them out in more detail. While they covered the biology, we covered the physics of estuaries and guided kids with experiments of what happens when river water meet the ocean.