Ontario Science Centre

Museum in East Toronto & Rosedale

Climb a rock wall, journey to the center of a human heart, catch a criminal with DNA fingerprinting and race an Olympic bobsled at the excellent, interactive Ontario Science Centre. Over 800 high-tech exhibits and live demonstrations wow the kids (and the adults feigning interest at the back). There's also the giant domed Omnimax cinema. Check the website for family events, including theme-night sleepovers.