Every Sun., Tues., & Wed. Runners of all abilities invited to join a run of 3–5 miles along varying routes from different locations. Rain or shine. Dozer Coffee (8 a.m. Sun. & 7 a.m. Tues.), 112 Jackson Plz., (734) 929–9022 & Fleet Feet (7 p.m. Wed.), 123 E. Liberty, (734) 769–5016. Free. fleetfeetsemichigan.com.

July 31–Aug. 2 & Aug. 13–16. Equine competition combining artistry and technical abilities highlighted by graceful freestyle routines set to music. No pets. Concessions. 8 a.m.–5 p.m., 11500 Glenn at Katz (west off Mount Hope Rd. from I-94 exit 150), Grass Lake. Free. [email protected].

July 31–Aug. 2. As many as 250 horses and riders enter this U.S. Equestrian Federation competition. Features dressage and stadium jumping, along with a cross-country phase that involves a mile-long gallop and jumping into water over barriers called “questions,” including logs, boulders, ditches, and banks. Refreshments. Pets must be on leash. 9 a.m.–5 p.m., Revel Run, 555 S. Dancer, Chelsea. Free. (734) 395–2633.

Every Tues.–Sun. All age 6 & up invited into the museum’s labs to use scientific tools and museum specimens. The newest program lets participants try out simulated snake senses to experience the world as if they were a snake. No live snakes. 11 a.m.–3 p.m., 1105 North University. Free. (734) 764–0478, ummnh.org.

Every Sun. All invited to a relaxed pickup game of this spirited team sport played with a flying disc. Note: Overly competitive players are politely asked to leave. 11:15 a.m., Fuller Park, just west of the pool & parking lot (or occasionally across the street). Free. (734) 846–9418, [email protected].

Local cellist & music therapist Grace Frielink and singer & multi-instrumentalist Sasha Gusikhin lead an all-ages collaborative music making session. Instruments provided. Noon–1 p.m., AADL Downtown, lower level program rm. Free. (734) 327–4200.

Every Sun. All invited to play one of a wide variety of board games in a casual, friendly atmosphere. Instruction provided. Also, on Aug. 2, game playtesting with Michigame Design Lab (2 p.m.), during which players are invited to try out new board and card games from local designers Bruce Bielawa & Joe Hopkins and provide feedback. Noon–6 p.m., 2459 W. Stadium. Free. sylvanfactory.com.

Every Sat. & Sun. Hands-on 20-minute family-oriented demo for kids age 5 & up that uses museum specimens to explore paleontology and what can be learned from giant bones and fossils. 12:30 & 2:30 p.m., 1105 North University. Free. (734) 764–0478, ummnh.org. 

Every Sun.–Thurs. (different times). All invited to work on their knitting, crochet, weaving, and embroidery projects. 1–3 p.m. (Sun.) & 6–8 p.m. (Mon.–Thurs.), 401 N. Fourth Ave. Free. (734) 780–7867. 

Every Sun. Thirty-minute tour that uses the museum’s specimens to tell the story of prehistoric whales and dolphins, who had 4 limbs and walked on land. 1:30 p.m., 1105 North University. Free. Limited capacity. Sign up at the welcome desk. (734) 764–0478. 

Every Sat. & Sun. Hands-on 20-minute family-oriented demo for kids age 5 & up that uses museum specimens to explore paleontology and what can be learned from giant bones and fossils. 12:30 & 2:30 p.m., 1105 North University. Free. (734) 764–0478, ummnh.org. 

Michigan Viking Alliance representatives discuss what foods medieval Scandinavians ate and how they prepared their meals. 4–5 p.m., AADL Downtown, 4th fl. Free. (734) 327–4200. 

Local cosplay enthusiast Ana Hotaling shares tips and tricks for styling wigs for cosplay. 4–5 p.m., AADL Pittsfield. Free. (734) 327–4200.

Discussion, trivia, games, and a costume contest. Followed by the 7 p.m. screening of a movie (at the Michigan Theater’s regular ticket price) to be chosen by Film Club vote; vote when you reserve a spot. 5 p.m., Michigan Theater Screening Rm. Free, preregistration required at marquee-arts.org/calendar.

Announcement of the winners of the 21st annual AADL LEGO Contest in 6 categories: adult, preschool, and grades K–2, 3–5, 6–8, & 9–12. Also, public display (4–6:30 p.m.) of all the entries, which must be delivered to the Sheraton Hotel, 9 a.m.–1 p.m. today. Rules and guidelines available at aadl.org. 6 p.m., Sheraton Hotel, 3200 Boardwalk. Free. (734) 327–4200.

Every Sun. All invited to join or listen to an instrumental jam session. 7–9 p.m., 318 S. Main. Free. (734) 665–2968.