The Pratt Nature Center in New Milford will celebrate Earth Day April 21 with a variety of activities from 10 a.m. to 4 p.m.

Offerings will include letter-boxing, planting, baby sheep exhibits, history hikes, master gardener visits, geocache, percussion by Hummingbird, demonstrations by Phys Ed, the Tick Mobile, a scavenger hunt, crafts, river trail walks, visits with Connecticut Farmland Preservation representatives and a visit with Atka, the white wolf.

For information, call 860-355-3137.