Check the weather; both activities involve a significant amount of time outside.
Iao Valley State Park has several areas with stairs and is not stroller-friendly at all.
If you’re interested in a behind-the-scenes tour of the aquarium, make sure to check the days and times that they’re offered.
Maui has beautiful weather all year long and this adventure would be great any time of the year.
The aquarium offers a family pass for 2 adults and 2 children that is 15% cheaper than regular tickets. This offer is only online.