Tree Cookies. What kind of cookie doesn't taste good with a glass of milk? Learn how to read a tree's life story by looking at a tree cookie (a cross-section of a tree trunk). Identify local trees by leaf shapes and participate in Tree-mendous nature crafts to take home. Free, 1pm, Stephens State Park, 800 Willow Grove Street, Hackettstown. Meet at the end of the main parking lot. In case of inclement weather, call the park office to determine if the program has been cancelled or rescheduled. 908-852-3790 or visit www.state.nj.us/dep/parksandforests/parks/stephens.html.