The Canadian Science and Technology Museum is located at 1867 St Laurent Blvd in Ottawa, ON. There's always a lot going on at the museum, including live experiments and demonstrations.
The permanent collections and exhibits are Into the Great Outdoors, Steam: A World in Motion, Sound by Design, From Earth to Us, Medical Sensations, Hidden Worlds, Zooom (for children 0-8), Wearable Tech, Technology in our Lives, Exploratek, Artifact Alley and of course the famous Crazy Kitchen.
There is currently a special exhibition called the Art of the Brick by Nathan Sawaya ($).
Admission is free daily between 4pm and 5pm. (Art of the Brick excluded).