Join the Smithsonian Environmental Research Center on a 2.75-hour canoe trips for families and individuals. You’ll paddle the Rhode River, learn about Smithsonian research, and look for wildlife like eagles, otters, and turtles. SERC will provide canoes, paddles, lifejackets, and instruction. For ages 8 and older; $18-$20.  9 a.m. to 11:45 a.m.; Smithsonian Environmental Research Center, Edgewater, MD. More information and registration.