I too, as a child, I loved collecting, but when I started to write about it, I realized that it could give a wrong idea, because nowadays it is known that it could be a problem when we pick up things that belong to nature, because everything is part of the ecosystem and everything has a role. Sometimes we are not aware to this role, but it is really best that we just leave as little as possible traces. When we visit nature, when we walk in nature, when we go on hikes or picnics or whatever, we should collect our trash, but also don't take away things that belong there. In many places, you could see signs that ask you not to take shells and pebbles and other things, and I didn't want to be confusing, that one thing, it's okay, one thing not. I decided to have it as a message in the book, that if you can leave it behind, it is best. You can just enjoy holding this nature item, appreciating it, taking a close look at it, feeling it. You can take a picture of it. You can have maybe a nature journal and draw it, but when you're done, just leave it there.