Found Object Christmas Tree

I love the idea of this found object Christmas tree!
Imagine taking bits and pieces of things you have collected over the 
years, mementos or other small objects that hold meaning to you, and 
arranging them into a holiday assemblage...

Wall assemblages are unique works of art! 
What makes them  so special is the personal connection that 
the creator has with each item or component. I think this idea would 
be great displayed year-round but in a different, (non-holiday) shape, 
such as a big star. 

I'm not sure how the tree in these photos was created- it looks as if each
item is adhered directly onto the wooden wall or door. Wouldn't this be neat 
created on an old salvaged door? You could also use plywood or a large screen
as a base.  Any other ideas?

all images via nicety

What do you think?