Free Museum Admission Blackstone Historical Museum, 23 Main St., Blackstone. First & third Saturdays from 10 a.m. – 4 p.m. and Thursdays, 12 – 4 p.m. Visit the mill room, war room, school room, farm life exhibits and much more. Free. E-mail: orcasymphony@comcast.net Free Wednesday Nights at the MFA. Musuem of Fine Arts, Boston. 4 – 9:45 p.m. www.mfa.org. Target $1 Friday Nights. Boston Children’s Museum. 5 – 9 p.m. 617-426-8855. www.bostonchildrensmuseum.org. Free Thursday Night at ICA. Institute of Contemporary Art, Boston. Thursday from 5 - 9 p.m. and the last Saturday monthly. www.icaboston.org. Free Wednesday Evenings. Fuller Craft Museum, Brockton. 5 – 9. Visit the Museum of Contemporary Craft. 508-588-6000 or www.fullercraft.org. Harvard University's Museum of Natural History. Cambridge. Free admission to MA residents on Wednesdays from 3 to 5 p.m. (Sept. - May) and Sunday mornings (yearround) from 9 a.m. to 12 noon. www.hmnh.harvard.edu. The MIT Museum. 265 Massachusetts Ave., Cambridge. Sundays, 10 a.m. – noon. http://web.mit.edu/museum/ Drop Into Art First Sunday of the Month. Danforth Museum of Art, 123 Union Ave., Framingham. 2 – 4 p.m. Free art activities for children; Free teen docent led family tours. 508-620-0937 Free Sunday. Providence Children’s Museum, Providence, RI. 9 a.m. – 6 p.m. Open free first Sunday monthly. 401-273-KIDS or www.childrenmuseum.org . Free Admission Worcester Art Museum, Salisbury St., Worcester. Saturdays, 10 a.m. – noon. 508-799-440. www.worcesterart.org.   Please e-mail your August listings and photos to calendar@baystateparent.com by Monday, July 7th at 6 p.m. The deadline for September calendar listings is Thursday, Aug. 7th at 6 p.m. For bonus calendar listings that missed our print edition, please visit the magazine's BLOG at http://baystateparent.blogspot.com/ and click on "bonus calendar listings link," found on the right side of the page.