Karate kick
If you are wanting a high success, kid friendly venue....I take my kids to Pitt marsh. Google earth the area and before you get to Grant Narrows, turn right on the gravel road and park at the pipe gate. Red and white bobber, medium split shot, #6 -8 hook and worm. You can catch catfish, bass, sunfish, crappies etc. Every pond or slough in that area has those fish. ....some have roadside access. Plus lots of wildlife to see.
In Burnaby ...deer lake has bass, sunfish, catfish, some trout and it is close with good access. I took a group of kids canoeing there and saw people fishing from the dock and several point in the southern shore. Worth a look. I took a small boat and floated around with my young son and we caught bass and sunfish on a bobber and worm.