Money Tip: If you have time to do more than 1 museum trip, then look for combo deals. Also, you are likely to get a better price online (if you can find a groupon, even better!) than landing there to buy them.
Aviation and Space Museum
A great recreational activity is the the Canadian Aviation & Space Museum - http://casmuseum.techno-science.ca/
It is based in the Rockliffe Flying Club (https://www.rfc.ca/en/) area & has a good collection on the evolution of flying objects -
Complete details - https://en.wikipedia.org/wiki/Canadian_Air_and_Space_Museum
On the day we went, they also had engaging activities for kids. So if you have any young ones accompanying you, it'd do you well to check online what activities are scheduled (especially during Summer) & head out accordingly.
Some interesting trivia on this place -
1. The focus is on Canada's contribution to aviation, especially those related to the Royal Canadian Air Force
2. There are some flight simulators & interactive exhibitions that may find your fancy!
3. You can sit in a cockpit, ejection seat & have a lot of interactive action.
EDIT: The Museum has conveyed that the StarFleet Experience was done only in 2016 and is not a permanent attraction -
@imnewinottawa Please note that the Starfleet Academy Experience was a travelling exhibition in 2016 and is no longer at the Museum https://t.co/w9L4Ku0HwN
— #AvSpaceMuseum (@avspacemuseum) April 18, 2017
4. Star Trek Fans - there is an interactive Starfleet experience that you may like 
Summary
On a personal note, we would consider taking a yearly membership that allows you multiple visits. Also, we are yet to do any of the simulators ourselves, so that's our plan in the coming summer!
Here are some additional pics to pique your interest -
Other Museums in Ottawa
Travel: Canadian Museum of History in Gatineau-Ottawa
Travel: Diefenbunker Museum in Ottawa
Travel: Canadian War Museum in Ottawa
