I've seen a few of these 3D cards around and thought I'd like to have a go at making one. This is what I came up with. Using dsp from the Holiday Catalogue and the tree from festival of trees.
I used a piece of cardstock 4 1/2" x 12 inches to make.
The great thing about this 3D card is that it folds down to fit a standard card envelope.
These cards are great for any occasion.
The instructions I used for this card are from here.