Delta Chelsea -- This is a perennial family favorite -- with good cause. The hotel boasts a Family Fun Zone, a multiroom play area with live bunnies and fish, a video arcade, and the only indoor waterslide in downtown Toronto (it's open year-round, too). You can play together in the family pool here or drop off the tykes for babysitting. Kids will enjoy the in-room family movies, Super Nintendo, cookie jar (replenished daily), and nightly turndown gift. Further reducing the strain on the family purse, kids have a half-price menu at some of the Delta Chelsea's restaurants.
Four Seasons Hotel Toronto -- A hop and a skip from the newly renovated Royal Ontario Museum, this hotel has its own attractions. There are free bicycles and video games for borrowing, and an indoor/outdoor pool. Upon arrival, room service brings the kids complimentary cookies and milk. The concierge and housekeeping staff work magic, including conjuring up excellent babysitting services.
Sheraton Centre Toronto Hotel -- The endless attractions of this complex -- including restaurants with special menus for tykes and a cinema -- mean there's a lot to keep the little ones entertained. There's a supervised play center, as well as on-call babysitting services. Kids also enjoy in-room video games and a welcome gift. A limited number of Family Guest Rooms boast a toy chest, some kid-size furniture, a fridge, and a microwave.