Practice your "nature ninja skills" in this in-person afternoon outdoors event for families based on The Umbrella Arts Center’s popular Ninjas in Nature class. Master instructors from the national Pathways Dojo share lessons on fire-building, stick carving, rope walking and making connections between the wilderness and your own neighborhood. Families are encourage to sign up in pods. Each family is assigned a shift for their activities. Activities held in Chamberlin Woods, 1172 Lowell Rd., Concord, MA 01742. Everyone should wear a mask and socially distance themselves during the Festival.