SUNDAY, JULY 14

Historic Aquatennial: The collection of Ken Hafften. 1-5 p.m. Hennepin History Museum, 2303 3rd Av. S., Mpls. $5.

Twin Cities River Rats: 3 p.m. and 7 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 Sister City relationships. 1-5 p.m. Nicollet Island Pavilion, 40 Power St., Mpls. Free.

MONDAY, JULY 15

The Twin Cities River Rats Ski Team performed a 'Super Mario World' water ski show on the Mississippi River in downtown Minneapolis Saturday. Towering pyramids, ramp jumpers and barefoot skiers were all part of the program free to the public. Mario characters Abe Cass, left, and Jeremy Tummel performed.

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