Eco Adventure Tour -- Looks great!: http://www.sceniccaves.com/cms/summer.cfm?dsp=Main&IssueID=9

Maritime History fun: http://www.discoveryharbour.on.ca/english/index.html

Rich people history fun: http://www.parkwoodestate.com/html/about_parkwood.html

How to attend Stratford Festival: http://www.ehow.com/how_2092413_canada-stratford-festival.html

Cheap tickets at the Stratford Festival: http://www.stratfordfestival.ca/BoxOffice/save.aspx?id=1154

If you have a tolerance for budget accommodations, hostels are great for adventure, making friends, and saving money, you can cook your own food too. Make a big pot of something to share and you'll definitely have friends. Yes, adults go to them, even in Canada, as far as I know. Hostelling might be good as a Wii/daughters family activity -- great way to see the world. Two potentially fun hostels with nearby adventures:

-- Algonquin Backpackers (a few different links)
http://www.algonquinbackpacker.com/activities.htm
http://www.travellerspoint.com/accommodation/1473-South-Algonquin-Backpackers/
http://www.hihostels.ca/ontarioeast/341/hi-south_algonquin_about.hostel

-- Barrie Summer Hostel
http://www.hihostels.com/dba/photo.php?lang=E&house=011039&p[0]=2&p[1]=2&p[2]=2&p[3]=2&p[4]=2&p[5]=2&p[6]=2&p[7]=2&p[8]=2&p[9]=2&picno=10&cou=CA&act=4&name=HI+-+Barrie+-+Georgian+Green+-+Barrie+Summer+Hostel
http://www.studentrez.com/hostel/hostel.htm


A few other suggestions: http://www.seetorontonow.com/Visitor/Experience/Day-Trips/More-Day-Trips.aspx

Remember the project:

Wii's 2010 Summer Blow-Out Filled with Fun, Frivolity, Adventure and Indulgence of Magnificent Proportion

Best,
Oldtimer