First, I had a lot of fear of this because I am afraid of heights, but my family ( 6 & 8 year old and my husband) convinced me that trip to Costa Rica without ziplining was not happening! From the minute we arrived, the guides were funny and told me that they would take care of me, despite my fear. Also, half way through, they did offer me an out, but I kept going. Safety was clearly a top priority. The 6 year old ziplined with a guide the whole time and absolutely loved it! The guide was so friendly and funny and took an amazing video above my 6 year old's head (as if it was a go pro). My 8 year old got nervous about the mechanics and the guides easily switched over so he could go with them as well. Often they just went right in front of him so he didn't have to be nervous about breaking. The views are just beautiful and I would encourage you to go, even if you are afraid of heights! We also loved the Tarzan swing, it was just a fun add on. Overall, we would highly recommend this company!