Bakken’s 50th birthday, plus 8 other free things to do
1. Bakken Museum turns 50
As part of the weekend celebration, the public gets free entry to the museum and grounds. The birthday bash Saturday features special activities. On Sunday, Minnesota STEM Book Fest hosts literary activities. (10 a.m.-4 p.m. Sat.-Sun. Bakken Museum, 3537 Zenith Av. S., Mpls. thebakken.org/fifty)…