Very true.
When I was a child back in the '70s the thing I liked most was sitting for hours on a roadside bench in my small hometown and writing down counties plates.
Every day it was a contest between counties and every day it was fun.
It is very important to keep this mindset of pure fun as an adult, but I think you can do it only if you feel satisfied with what you have. That's the most important thing of all: getting satisfaction out of small things.