Creative Construction: Lego Building Challenge: 8 a.m. to 7 p.m.; Fort Wayne Parks and Recreation Community Center, 233 W. Main St; 427-6467 or www.fortwayneparks.org.
Follow the Pipes: Organ concerts in the Fort Wayne area. Times and locations available at 426-2882 or www.fwhistorycenter.com.
Trinity English Shining Lights: 8:30 a.m.; Trinity English Lutheran Church, 405 W. Wayne St.; 426-3424 or www.trinityenglish.org. A fine arts adventure of music, drama and dance. For ages 8 to 14. Cost is $20.
Ventures in Creativity: 9 a.m. to 5 p.m.; Mimi and Ian Rolland Center for Art and Visual Communication, Weatherhead Gallery, 2701 Spring St.; 399-7999.
Talk To A Lawyer: 10 a.m.; Allen County Public Library downtown, 900 Library Plaza; 407-0917. Free legal advice from licensed attorneys.
T.R.A.I.N. Festival: 10 a.m. to 5 p.m.; The History Center, 302 E. Berry St.; 426-2882 or www. fwhistory center. com. Model railroads with fully operational freight yard run by the Three Rivers and Northern Indiana Train model railroad club. Cost is $6 adults, $4 students and seniors, and free ages 2 and younger.
Rhythm and Flow Summer Garden Exhibit: 10 a.m. to 5 p.m.; Foellinger-Freimann Botanical Conservatory, 1100 S. Calhoun St.; 247-6440 or www.botanicalconservatory.org. Features swaths of color formed of mixed-species floral beds with geometric topiary sculptures. Cost is $5 adults, $3 ages 3-17, and free ages 2 and younger.
Lunch Time Music: 11:30 a.m. to 1:30 p.m.; Hanning & Bean Festival Plaza, Headwaters Park East. Music from the Gregg Bender Band. Free.
Envision Fort Wayne Center: 11 a.m. to 3 p.m.; 916 S. Calhoun St.; 427-1129 or www.riverfrontfw.org. A place for the community to comment, discuss and review all aspects of the Riverfront Study.
Downtown Midway: 11 a.m. to 11 p.m.; Headwaters Park East and West. Amusement rides, pony rides, water balls and human hamster balls and face painting.
Helicopter rides: 11 a.m. to 11 p.m.; Headwaters Park West.
Three Rivers Festival Family Fun Day: 11 a.m. to 11 p.m.; Headwaters Park East and West. Clowns, balloon animals, big savings on amusement ride wristbands.
Marketplace: 11 a.m. to 11 p.m.; Headwaters Park West. A mini-shopping bazaar.
Auto Race – Three Rivers Festival 100: Gates open at 4 p.m., qualifying at 5:30 p.m., racing at 7:30 p.m.; Baer Field Speedway, 4331 Winters Road; 478-7223 or www.fwrace.com. An evening of high-speed auto racing featuring 100 laps of Outlaw Super Late Model racing. Cost is $20, $5 ages 6-12, and free ages 5 and younger.
Greyhounds in the Park: 4 to 8 p.m.; Franke Park Pond Pavilion, 3411 Sherman Blvd.; 402-4378 or www.allstargreyhounds.org. Meet retired racing greyhounds and their owners.
Bed Race: 6 to 8 p.m.; Main Street between Lafayette and Clinton streets. Watch five-person teams race their unique beds down Main Street. Cost is $50 per team.
Concert – Tim Harrington Band , The Jug Huffers and The Atomic Sharks: Doors open 6 p.m.; Hanning & Bean Festival Plaza, Headwaters Park East. Cost is $2.
The 3 Rivers Film Festival: 8 p.m.; Cinema Center, 437 E. Berry St.; 484-8839 or www.cinemacenter.org. Showcases the best in independent film made by local filmmakers.