Charm City Farms will host a "MicroHerding Invertebrates" class on July 31, from 4 p.m. to 9 p.m., in which participants learn to set up small habitats to take home with their choice of crickets, mealworms or red wiggler worms. The class includes a demonstration on cooking with edible insects, and takes place at the farm's Brick Barn, 1310 Hillman St., across from Green Mount Cemetery. $40. Visit charmcityfarms.org for more information.