I can understand having a hobby and becoming enthralled in said hobby.
As a horny preteen I was obsessive when it came to collecting the New Kids on the Block trading cards. I had all of them. Should I get a duplicate card? The overwhelming sadness would have put a high school break-up to shame.
This is no joke people.
Big. Deal. People.
Where was I?
Oh yes. A hobby. Appreciate it. Embrace it. The fact is some people, including your children, are obsessive freaks when it comes to collecting or making things.
Ooooooh - there's definitely a But! because when that obsessive need turns utterly CREEPY you get something like this:
I don't even know what to say except... what happens when the poor tree wants to GROW! and EXPAND! and LIVE!