It's been years since I've been to Montreal, and will now be flying through on my way to London in October. I have a 6 hour layover and am wondering if it is worth it to leave the airport? I will me traveling with my toddler, and subtracting time for transport, will only have about 3.5-4hrs to hang out in the city. Sould I even bother? If so, what should/could I do?