Perhaps it was the Brothers Grimm and their “Handsel and Gretel” candy-cottage that inspired 16th century Germany to produce the first gingerbread houses. Or perhaps it was the other way around. According to food historian Tori Avey, the matter is up for debate. Regardless, the confection constructions are still popular, especially around the holidays. And, with its drop-in Once Upon a Gingerbread House events, the Rincon Valley Regional Library in Santa Rosa is making sure locals get a chance to build and decorate one. The first event, just for ages 0–6, will be held on December 4 and the second, for all ages, will be held on December 7. Both will start at 10:30 a.m. and materials, including graham crackers and candy, will be provided. See sonomacounty.libcal.com/event/6052524 for more information. For those who would rather look at than make the fantastical homes, there’s the free Fourth Annual Gingerbread House Showcase and Competition at the Hotel Petaluma in Petaluma. It will be held on December 13, 1–9 p.m.; December 14, 10 a.m.–9 p.m.; and December 15, 1–5 p.m. See details at facebook.com/hotelpetaluma.