Spending time with mountain gorillas is perhaps one of the most precious ways to spend time. You only get one hour with them for a given day, and you will spend more time than that getting to and from them. Let alone the fact that you have to travel to heart of Africa to even see them, which itself might take a good day to fly to depending on where you're coming from.
Baby gorillas, besides being adorable in the way that most baby animals are, can be quite amusing and entertaining to watch. They're still young, and finding their place in the world. A gorilla in training to say the least. Their lighter weights seems to propel them upwards, higher into the trees than a silverback would climb. That is also due, in large part, to the fact that most trees probably couldn't support the 500lbs or so that a silverback might weigh.
If you're thinking, "but wait, what about the 800lb gorilla?" Sorry to disappoint, but even obese gorillas don't get that big. Play time might be in the trees for the little ones, but it's mostly a ground-living life for the family.
One of the Humba Family's youngest members at Virunga National Park, a UNESCO World Heritage Site.