Visiting Oahu Feb 6th-Feb 18th!!! Need some suggestions!!!

I will be in Hawaii visiting family and taking a much needed vacation.

Arriving in the late evening of FEB 6TH and leaving on the evening of FEB 18TH!!!

I would like to know if there are any places that are a "MUST SEE" place. Whether its food, sightseeing or something. I am interested. I've been once. But now I am going with my kids, so anything also kid friendly, would also be cool.

(Also, I'll be in Waikiki area, I THINK. And I will have a car. So if it's in the other side of the island, please still give the suggestions. I'd love to see something new this time around.)

Also, looking for a good place to stay. Havent booked the Air b&b yet. Hoping to do that this week. So if you know of anyone who has a B&B, or a place they want to rent. Please please let me know. (So far the places I've looked at are from $1000-$4000(crazy high) for the time I'll be there.)

I think that I covered everything I wanted to ask about. I hope that I get some suggestions as I would love to do some fun stuff!