An activity that you should do.

Calypso.

I think you should go to Calypso waterpark because it's very entertaining. The attractions are fun and you'll always want more. There are many kinds of attactions. Whether you're scared or not, there is always something for you. For example; if you're scared of highs you can always stay on the wave pool and if you're a child you can go in the child park. 

Depending on what day you're going, the waiting time can be short or long. Of course it go on a Saturday and it's sunny you'll have to wait for a long time to do the attaction. But that time isn't wasted because you can talk and have fun with your friends. Plus, there are always some waterslides that don't have long waiting lines. Actually, when I was there, I did the same one four times in about an hour. In addition, it's worth waiting for a long time because the water is very refreshing.
An other reason that you should go is that it's very near Ottawa (less than 45 minutes of car!). Plus it's not very expensive for all that you'll be able to do in a single day.
At the end of the day, you'll have plenty of good memories to remember.