The zip line and cave tubing is a blast. Doing this tour from Ambergris Caye is not difficult. All you need to do is board the first ferry at 7:00am and your adventure begins. The services of Action Boys Belize is not expensive . Doing the tour through them cost about half the price the tour is sold for on the Island.
Phils Tours also offers zip line tours from the Sibun Caves branch system.