perception-of-time
Explanation
The Joke
A child expresses amazement at understanding a concept about aging: that as you get older, each year feels shorter because it represents a smaller fraction of your total life experience. She explains that if you live 1,000 years, a year would feel like a single day does to a normal person -- it would be like a single grain of sand in a desert, an hour to us would feel like a minute to them.
The child then concludes with great enthusiasm that this must mean old people find baseball "really exciting" because it is "action-packed" relative to their perception of time. This is, of course, the opposite of how this observation is typically used -- people usually invoke the shrinking perception of time to express melancholy about aging. Instead, the child takes the concept and arrives at a hilariously wrong but internally logical conclusion.
The Humor
The humor comes from the child''s innocent but creative misapplication of a genuine psychological concept. The idea that time feels like it passes faster as you age (sometimes attributed to the proportional theory of time perception) is a well-known and often melancholy observation. The child takes this serious idea and runs with it in a completely unexpected direction, arriving at the conclusion that baseball -- a sport famously mocked for being slow and boring -- must seem thrilling to old people because their compressed sense of time would make a three-hour game feel like it flies by.
It is also a sly dig at baseball''s reputation for being tedious, suggesting that the only people who could find it exciting are those whose perception of time is so warped that everything seems to happen quickly.