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 Sat., Fri., & Wed. All invited to play one of 200 songs, with melodies transcribed in numbers, on the 17-bell chime’s numbered keys. Ambitious players can add chords. Kids welcome. 10:30–11 a.m. (Sat.) & noon–12:30 p.m. (Wed. & Fri.). Free. [email protected].

Every Thurs.–Sun., June 4–Sept. 28. Local musicians TBA perform at several locations along Main downtown. Rain cancels. 4 p.m. Thurs.–Sun., S. Main between E. Washington & W. William. For the complete lineup, go to mainstreetannarbor.org/a2-summer-streets. Free.

All invited to bring anything that needs fixing—chairs, sweaters, radios, whatever. Maker Works members and staff on hand help with repairs. Handy people invited to assist. Repairs not guaranteed. Also, toy adaptations to make off-the-shelf toys more accessible for people with disabilities. 4–6 p.m., 3765 Plaza. Free. Preregistration required at maker-works.com/fixitfriday. (734) 222–4911. 

Teens and young adults invited to learn how to build a fire and cook fries over it. Materials provided. Dress for the weather. Minors must be accompanied by an adult. Inclement weather cancels. 5–6:30 p.m., Island Park Shelter A, 1420 Island Dr. Free, preregistration required at tinyurl.com/a2parksrec or (734) 794–6250. [email protected].

All invited to a free open ice skating session to celebrate the end of this year’s AADL Summer Game. Skate rentals, free. 6–8 p.m., Yost Ice Arena, 1116 S. State. Free. (734) 327–4200.

See 14 Friday. Tonight: Midnight Special, a Pinckney-based Texas blues trio. 6:30–9 p.m.

See 7 Friday. Tonight: an ensemble led by Ypsilanti jazz guitar virtuoso, and Summer Jazz Series founder, John E. Lawrence. 7 p.m.

Every Fri., except Aug. 14. All invited to drop in to use the observatory’s 1857 Fitz telescope and other modern instruments. Exhibits are also open regardless of viewing conditions. Last visitors admitted 30 minutes prior to closing. 9–11 p.m., 1398 E. Ann at Observatory. Free, no registration required. (734) 763–2230, detroitobservatory.umich.edu.