My cousins are visiting vancouver in two weeks!! Woohoo!! Haven't seen them in a few months and it'll be there first time in vancouver

they'll be here for a 3 weeks but are already spending a couple of weeks going to the rockies, and going on an alaskan cruise. they'll be here for around 8 days total

i want to maximize their time here so... where should i take them?

their age ranges from 7, 13, 15 (girls); and 10 (boy)

so far i have... stanley park, aquarium, gastown/ chinatown suspension bridge

no-no's for me are:
playland (they can go to better amusement parks any time)
robson (maybe the 15 yr old might be interested, but that's it)