Friday

Hennepin History Museum Aquatennial Exhibit: Memorabilia from the past 73 years, including coronation items, uniforms, clipping books and more. Hennepin History Museum, 2303 3rd Av. S., Mpls.

10 Best Days of the Bakken: Themed days with exhibits and activities include "Minnesota Makers," "Garden Variety Day," "Sunergy" and more. Also, the Green Energy Art Garden, a green rooftop where artists work with visitors to create science-inspired, eco-electronic art and music. 10 a.m.-5 p.m. Bakken Museum, 3537 Zenith Av. S., Mpls. Free

Aquatennial Tennis Classic: 9 a.m.-5 p.m. One Financial Plaza, 5th St. and 2nd Av. S., Mpls. Free

SATURDAY

10 Best Days of the Bakken: Themed days with exhibits and activities. 10 a.m.-5 p.m. Bakken Museum, 3537 Zenith Av. S., Mpls. Free

Twin Cities River Rats: Water ski show. 3 & 7 p.m. Mississippi River, between Broadway and Plymouth Av. bridges, Mpls.

SUNDAY

10 Best Days of the Bakken: Themed days with exhibits and activities. 10 a.m.-5 p.m. Bakken Museum, 3537 Zenith Av. S., Mpls. Free

Twin Cities River Rats: Water ski show. 3 p.m., Mississippi River, between Broadway and Plymouth Av. bridges, Mpls.

Aquatennial Beach Bash: Milk carton boat races and family activities. 10 a.m.-4 p.m. Thomas Beach, Lake Calhoun, William Berry and E. Calhoun Pkwys., Mpls.

Sister Cities Day Celebration: Entertainment, ice cream and activities to celebrate Minneapolis' 10 sister-city relationships. 1-5 p.m. Nicollet Island Pavilion, 40 Power St., Mpls. Free