Ehh…I disagree with this if we are specifically talking about what the OP is referring to.
When you’re a child, everything is new, making all of it exciting. For example…as a child, OP had only experienced winter a few times. As an adult, they’ve experienced countless winters. It becomes routine instead of new and so it fades into the background. And with adult obligations to worry about, we don’t have that worry free child mind that can drift off like that. It’s just part of getting older.
OP, sometimes it’s worth making a conscious decision to stop and take a moment to notice and experience your surroundings. There’s a thunderstorm outside? Grab a warm cup of coffee and just try to watch and listen for a moment. If possible, open a window (that won’t let rain in) or sit outside under an awning and just take in all of your senses. Go out for a walk without any music and without using your phone. Try to look at the trees and birds around you and take it in. Smell the air…has the grass been recently cut? Has it rained recently? Is there mud around? Is someone nearby grilling some food? Are there leaves on the ground? Try stepping on one. Do they crunch or are they soft and wet?
As a child, everything is new. As an adult, it’s routine and boring. But you can still manage to capture a small bit of this feeling back if you actively decide to stop from time to time and consciously try to take in your surroundings for a moment. Stop and try to feel all of your senses.
You can never make these feelings new again, but sometimes I find some satisfaction in watching and listening to the world around me.