Please feel free to add more in the comments. I didn't check to make sure these places are open, so double check that. These were suggestions I received on Facebook.
Imagination Place in Buffalo
Seaquest
Sea Life-MOA
MN Zoo
Children’s Museum
Science Museum on MN
Fawn Doe Rosa (Opens in May)
Como Zoo
InnerActive
Good Times Park Eagan
Splash Pads
Carlson’s Lovable Llamas (We went here for our “rehearsal” dinner)
Superior Zoo-Duluth
Oxbow Park
Zollman Zoo
RAD Zoo
Snake Discovery Zoo
Safari North
Gale Woods Farm
Shakopee Memorial Park to feed/see the ducks
Nature Park Reserves-Tamarack, Hyland, Dodge Nature Center
Teddy Bear Park in Stillwater
Franconia Sculpture Park
Chutes and Ladders Park in Bloomington
Springbrook Park in Fridley
Wildlife Science Center in Stacy, MN
Hemker Zoo in Freeport
Minneapolis Sculpture Garden/Park
Eagle Eye Farm
MiniSota Play Café
Sustainable Safari at Maplewood Mall
Hidden Falls Regional Park
Discovery Hallow at Tamarack Nature Center
Arboretum