Science fair help, for ages 10 or older, assistance with long-term projects. 4 p.m., Hyattsville Library, 6532 Adelphi Rd. Free. 301-985-4690.
Public schools hearing, a presentation on proposed boundary and grade-structure changes at Kingsford, Highland Park, Yorktown and Waldon Woods elementary schools. 6:30-7:30 p.m., Gwynn Park Middle School, 8000 Dyson Rd., Brandywine. 301-952-6300 or firstname.lastname@example.org.
Friday, Dec. 2
Al-Anon, for family and friends of alcoholics. 7 p.m. Fridays, Laurel Regional Hospital, 7300 Van Dusen Rd., Laurel. Free. 301-497-7914.
“Fit-n-Fun Cardio,” for all ages. 10-11:15 a.m. Mondays, Wednesdays and Fridays, Greenbelt Community Center, 15 Crescent Rd. Call for registration information. 301-397-2208.
Jazz and blues cafe, with pianist John Guernsey. 6:30-8 p.m. Friday, Dec. 9 and 16, New Deal Cafe, 113 Centerway, Greenbelt. Admission, free. 301-474-5642.
Motivational presentation: “Should, Could, Dream,” for ages 12 to 18, the monologue focuses on themes of achievement, self-esteem and entrepreneurship. 7:30 p.m., Bladensburg Community Center, 4500 57th Ave. $3. 301-277-2124.
“An Evening in Monte Carlo,” games of chance, live entertainment and a live auction, sponsored by the Delta Alumna Foundation. 8 p.m.-midnight, Martin’s Crosswinds, 7400 Greenway Center Dr., Greenbelt. $60, reservations required. 301-868-4379.
Saturday, Dec. 3
Bowie bird walk, Prince George’s Audubon Society members lead a walk in the Fran Uhler Natural Area; waterproof footwear and binoculars suggested. 7:30 a.m., meet at the end of Lemons Bridge Road, next to the Bowie State University campus, 10300 Lemons Bridge Rd. Free. 410-765-6482.
Glenarden computer class, the basics of keyboarding and Internet searches. 9 a.m. Saturday, Dec. 10 and 17. Glenarden Library, 8724 Glenarden Pkwy., Lanham. Free. 301-772-5477.
Lego competition, for ages 9 to 14, a global robotics program. 9 a.m.-noon, Walker Mill Middle School, 800 Karen Blvd., Capitol Heights. Free, registration required. 301-925-9350.
Wildlife holiday bazaar, unique nature-themed gifts. 9 a.m.-4 p.m., National Wildlife Visitor Center, 10901 Scarlet Tanager Loop, Laurel. 301-497-5887.
Holiday sharing fair, take alternative gifts that support environmental causes, and justice and peace; with hot drinks, baked goods and a children’s secret Santa. 9:30 a.m.-3 p.m., University Park Church of the Brethren, 4413 Tuckerman St., University Park. Free. 301- 864-4328 or email@example.com.
Greenbelt Festival of Lights, with an arts and crafts workshop, prize drawings, live music and a dance party. 10 a.m.-5 p.m. Saturday; 11 a.m.-4 p.m. Sunday, Greenbelt Community Center, 15 Crescent Rd. Free. 301-397-2208.