On Oct. 26, 9 a.m. to noon, spend the morning at Kenilworth Park removing invasive plants, collecting litter and working on other park-beautification projects. Registration opens at 8:30 a.m.; arrive no later than 8:45 a.m. Kenilworth Aquatic Gardens is at 1550 Anacostia Ave. NE. Be prepared to work outside. Wear closed-toe shoes and weather-appropriate clothes. Please also bring a own water bottle and sunscreen. Volunteers under 18 must be accompanied by an adult chaperone, parent or guardian. This event is eligible for Student Service Learning hours. Friends of Kenilworth Aquatic Gardens is a 501(c)3 nonprofit. They work alongside the National Park Service to maintain the park. Contact David Drawbaugh, Friends of Kenilworth Aquatic Gardens, at firstname.lastname@example.org or 202-695-0352.