We love the North End Splash Pad! Great for a hot day, but bring an umbrella for shade or make sure you're sporting hats because there isn't a tonne of shade for relaxing in. There is a covered area with picnic tables that's awesome but can get crowded early.
Lots to do, lots of sprayers over a good area and the dry park is right beside it.
Nice little recreation centre. During the summer it has a toddler park, a more advanced park, splash pad, Beach volley ball court. There is a soccer field in the rear. Winter time the centre has two boarded rinks, as well a mini rink for younger kids. The hall is available for rent.
Excellent place to run your event. Big space, clean. Lots of resources available to help you run what you need. Also by far the fairest price point in town while being in a safe area.