This video has gotten pretty popular already, but take a look if you haven’t seen it yet.
A little boy (identified as 4-year-old Malcolm from Maine) with a helmet cam tackles the trail at Highland Mountain Bike Park in New Hampshire with his dad. The joy he expresses at his accomplishments is priceless. You only need to watch the first minute or so to feel his happiness. And, wow, the kid appears to be quite a rider for such a young age.