Now hear this! Take a step back in time and learn all about how the phonograph (what many of us now call a record player) began the home entertainment revolution. The Westminster History Center debuts its newest FREE “trunk show” Revolutions in Sound on Saturday, April 23 at 11:30 a.m. The interactive trunks contain all sorts of neat historic items, which volunteers use to illustrate a topic. In this case, it is how science plays a role in creating modern-day entertainment. Kids and adults alike will find this great fun. 7200 Lowell Blvd., Westminster, 303-428-3993.