Pack a picnic lunch to enjoy around the picnic tables at Maplewood Farm. Make sure everyone has a water bottle and don't forget to bring your camera. The water at Lynn Canyon is very cold (glacier runoff), but my nugget thoroughly enjoyed walking around in the shallow areas, so for this I recommend sandals. Your best bet for carrying your nugget on this hike is to have a hiking carrier backpack.
Hiking into the canyon should be taken slowly. There are many stairs and a few trickier spots depending on what trail you take. The first thing you'll want to check out before descending into the canyon is the suspension bridge. It is located at the beginning of the trails close to the visitor center.
These are sunny day activities. Weekends are always busier, making it more difficult to find parking. If you're taking public transit, buses come more frequently on weekdays.
Summer is the most enjoyable season for these activities, anywhere between June and September.
Lynn Canyon is free and Maplewood Farm is pretty inexpensive. Save money by bringing your own food and water.