Los Suenos & Manuel Antonio - Sights & Activity suggestions?

I am traveling with my wife and three (teenage) kids to Costa Rica this summer and we are booked to spend 5 nights in Los Suenos at a resort and three nights at a VRBO in Manuel Antonio. I went to CR with my wife 20 years ago and we did the Guanacaste Peninsula, Arenal, and cloud forest and I'd love to do that again, but we don't have enough time and for this trip we decided to stay put and enjoy relaxing a bit more. We will do Tortuga island, Jaco beaches, and the national park but I wanted to see if anyone had some suggestions about what to do in the area for other adventures. Thanks!