system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do kids love bright colors so much, but as they get older, bright colors seem less important?
gpt
While growing, humans use attention to collect useful information. In early childhood attention is mostly focused on easily perceivable differences between events and things like contrast, brightness, loudness, primary tastes etc When you grow older you already collected that information and unless some part of your focus got permanently attracted to some of it, like getting hobby of collecting colorful things, your attention moves onto other, more complex and nuanced differences like differences in art style, subtle tastes, refined music styles etc.  
Why is it working this way? Because brain builds more complex concepts using more simple ones increasing neural network complexity for their representation.