Cypress Harbour is a great family-centric resort that has features that would be attractive to children at about every age. While there are a lot of variations in what any given 13 or 9 year old likes, I think that the variety of pool styles, structured activities, rentals (boats and bikes that both, I think, require an adult to accompany those who are under 18), and play areas - mini golf, basketball, shuffleboard, volleyball, tennis and a grassy open area that they term as the "soccer field" - would appeal to them.
Dick Taylor