We planning a summer vacation for our family (including my husband, myself, and our 4 young children ages 18 mos - 7 years). We are looking for something within about a 6 hour drive of Toronto (keeping in mind that a 6 hour drive with 4 kids is likely to take 8!)...a 'destination vacation' in that we would drive to specific destination to see/do something specific, but somewhere that would also offer some choices of activities over a few days. (for example, we went to Philadelphia a couple of years ago to go to Sesame Place there, but also did some of the attractions in Philly). We would prefer to stay in Ontario, but are open to travelling to the US as well. Any suggestions?