The Children’s Museum of Southern Minnesota has announced ambitious plans to build a $4-million permanent museum in downtown Mankato. The museum’s executive director appeared before the Mankato City Council on Monday to ask for a $250,000 donation in order to purchase the parcel of property on the former Ember’s restaurant site next to the Blue Earth County Library. The museum’s Peter Olson told the council that the estimated 50,000 visitors to the new facility every year would have an economic impact of around $5-million. The city has made no commitment to the request at this time. Olson says that a total of $1.66-million in donations has been pledged to the project so far, including $1-million from Lyle and Kay Jacobson, as well as $100,000 from the Minnesota Corn Growers Association. The Children’s Museum of Southern Minnesota has had three temporary homes since it first organized in 2006, including it’s current home on East Cherry Street in Mankato.