Hi! Most of this is doable with a couple of exceptions:
– Sky Lagoon has a minimum age of 12, and I think Hvammsvik has a minimum age of 10. But there are lots of other places to swim, including local town thermal pools.
– Getting up to Akureyri would probably mean flying up there, unless you’re okay with a 5 hour drive each way. You may want to skip the trip up north and do whale watching somewhere else?
– Yes, you can visit the Westman Islands as a day trip!
– You can see more about our custom itinerary planning here:
https://icelandwithkids.com/itinerary-planning-and-personal-vip-tours-of-iceland/
Thanks!