I don’t remember if I saw this one in person or not, but the Morton rotates through large, nature-inspired sculptures like this every few years. And you’re right, a lot of them will include natural materials but they are generally metal or concrete shells over a metal frame.
Here’s their current installation: https://mortonarb.org/explore/activities/exhibitions/of-the-earth/
Snow is a great example. As a kid, snow was freedom from school, a sculpting medium, a sledding surface, a new landscape to explore…
As an adult, it mostly means tangled commutes and manual labor.
Granted, a gentle snowstorm can be pretty nice when you don’t have work the next day, but it doesn’t have the same magic it did.