The National Zoo celebrates Hispanic Heritage Month with its Fiesta Musical, featuring Latino dance and jazz performances, art exhibits, animal demonstrations, crafts and food vendors, Saturday and Sunday from 11 to 6 and at the zoo, 3001 Connecticut Ave. NW (Metro: Woodley Park/ Zoo, Cleveland Park). Admission is free. Call 202/673-4717.
Big Apple Circus
The Big Apple circus's new production, "Bello and Friends," presents award-winning clown Bello Nock and a cast of trapeze artists, jugglers, acrobats and elephants, at the Dulles Town Center, Routes 28 and 7 in Sterling. Performances are Friday at 7, Saturday and Sunday at 12:30 and 4:30 and Tuesday through Thursday at 7, with 18 more shows through Oct. 11. Tickets are $12 to $31 weeknights, $15 to $40 weekdays. Call ProTix, 703/218-6500 ; for information, call 800/922-3772.
Rock Creek Party
Rock Creek Park celebrates its 109th birthday with slide shows, guest speakers, ranger-led programs, face painting, art activities and other entertainment, Saturday from 9 to 5 at the Nature Center, 5200 Glover Rd. NW. Entertainment is by the Blue Sky Puppet Theatre, Banjo Man and Cody & BJ. Admission is free. Call 202/426-6828.
Columbia Classic Grand Prix
Top equestrian riders compete in the Columbia Classic Grand Prix, Sunday at 1:30 at the arena at Howard Community College on Little Patuxent Parkway in Columbia. Gates open at 10. The Oak Contracting Junior/Amateur Jumper Classic is at 11, and the parade of riders is at 1. Bleacher seats are $8, $5 for children 12 and under; lawn seats are $5, free for children. Call 410/772-4828.
Fall Home Show
See the latest decorating, remodeling and home improvement products and more than 300 exhibitors at the Fall Capital Home Show, Friday and Saturday from 11 to 10 and Sunday from 11 to 6 at the Capital Expo Center, on Willard Road off Route 28 in Chantilly. Admission is $8 for adults, $2 for children 6 to 12 (younger free). Call 703/227-0714 or 703/802-0066.