‘Hibernator’s Den’ Family Art Project and ‘Who’s Awake?’ Family Walk

For some animal species, winter is just one long snooze. For some humans, it’s an excuse to have a pajama party. Wave Hill, the public garden in the Bronx, will combine elements of both in its family art project, “Hibernator’s Den,” which invites children to visit Wave Hill House in their pajamas, but not to sleep. Each day this weekend, from 10 a.m. to 1 p.m., they will make masks of hibernating creatures — bears, bats, toads and hedgehogs — or models of their dens while listening to related tales. On Sunday only, at 1 p.m., the focus shifts with the “Who’s Awake?” family walk, for children 6 and older. The naturalist Gabriel Willow will lead this trek from the Perkins Visitor Center through the grounds to discover those species whose adaptations let them weather the winter without sleeping. (Mr. Willow will also conduct two other weekend walks that are open to children 10 and older: “Nature’s Endurance,” meeting at Wave Hill House on Saturday at 9:30 a.m., about how plants and animals survive the season; and “Winter Birding,” meeting at the Perkins Visitor Center on Sunday at 9:30 a.m. All activities are free with garden admission, but the birding walk requires registration, either online or at the visitor center.)