Pomona? I assume your younger son is interested in Pomona College which, along with Claremont McKenna, Harvey Mudd, etc, is one of the Claremont Colleges. That's located in Claremont (just a few miles from Pomona), which has a nice little section called Claremont Village with some nice restaurants and shops. There's also Cal Poly Pomona, a mid- to upper-level Cal State University, and Western University for graduate-level health sciences degrees. Honestly, there isn't much in Pomona, the big draw is the LA Fair in September held at the Pomona Fairplex, which also houses the drag raceway. Downtown Pomona is very small. The Glass House in downtown generally has some good bands. Of course, as jleves alluded too, there are lots of fun things to do in the LA area, Huntington Beach, Anaheim Packing District is a nice place to eat, Santa Monica Pier and 3rd street, Old Town Pasadena, the various amusement parks, great hiking (if you like hiking and have the time try "Bridge to Nowhere", get there early), drive up to Malibu, Hollywood for the typical tourist stuff, catch an Angels game (much easier to get to Anaheim (than LA) from the Pomona area,...rent a car and drive (and always check the traffic).