Family Friendly Restaurant near Delta Hotel in Toronto...
Are you staying at the Delta on Dixie Rd, just west of the airport? If so, then you're just up the street from The Big Fat Greek Buffet, which has gotten decent reviews on the board and elsewhere. I couldn't find a web site, but here's the listing on Urban Spoon.
And here are the previous threads about it:
Big Fat Greek Buffet
5165 Dixie Rd, Mississauga, ON L4W4G1, CA