Nicholas Burton (middle) and Andrew Burton (right) play with the River Stream Simulation at VT’s GeoFair in the Museum of GeoSciences last Saturday.Mason Fenn, 9, builds his own model with the help of VT Student Rui Maia at the Gumdrop Crystallography station.The Museum of Geosciences is housed in the VT Department of Geosciences and located in 2062 Derring Hall. Public hours are 8 a.m.-5 p.m. Monday-Friday. Exhibits include the OmniGlobe, gems, minerals, rocks, fossils, and a full-scale cast of an Allosaurus dinosaur skeleton. The minerals and fossils on display include many specimens from Virginia and famous localities worldwide.