It is a multi-piece origami model which will lovely sit on your table during the holidays! (or any time if it is your "trip"). Why did I say "multi-piece" not modular? A multi-piece model is made of more than one piece of paper. A modular model us a subcategory of the multi-piece model wherein the units of the model are the same. This Christmas tree, although it has units similar to each other, the sizes are quite different (difference: at least 2 cm).
Merry Christmas to all of you!