Hi there ~ good question.
I really depends on what you like to do
I like to read and get some sun, I have no problem spending a whole day at the pool.
My DD8 is a fish and loves the water ~ intermingled with activities that the CM's do with the kids daily and meals ~ she was also fine spending a whole day without even leaving the hotel.
We only did half day excursions to parks either leaving first thing and returning by 2:00pm or leaving at noon and returning in the evening + 2 days in 10 never leaving the hotel.
Enjoy your stay at AKL,
>>^..^<<