Children and adults are invited to participate in nature and conservation activities during March at the Essex County Environmental Center. There are three sections of “Little Explorers Spring Nature Program,”  a child-caregiver class uses stories, walks and crafts to develop an awareness  for science and nature.  “Chair Yoga” for adults is a relaxed yoga class for adults 65 and over. “Bug Club,” for children ages 6-10, is also a one-day class for children interested in insects, and will take place on Tuesday, March 12, at 4 p.m. “Horticulture for Seniors” will take place on Monday, March 18, 1 p.m., led by Rutgers Master Gardeners of Essex County. These classes take place at the Essex County Environmental Center, 621A Eagle Rock Ave., Roseland. For information on these and many other classes and activities, call 973-228-8776