Amazing dolphin boat tour + snorkeling on the Golf. This will be scheduled as a group tour during your stay (Saturday, April 4th).
This experience has 8 lines going directly through the jungle canopy. Tours can be set up individually, just ask your host.
Short and easy walk through the sloth garden.
Long walk through the Corcovado National Park (5-10 hours) to see even more of Costa Rica's wildlife.