From the first moment we saw this idea, we were captivated by how nice it would be to have a memory like a tree as a guest book with their fingerprints and names. It is an interactive idea that will last through the years.
You can do it yourselves the trunk of your tree or bleudetoi (the last two images) are experts in developing the draft ready for your fingerprints.
Images: Passing Open Windows, A Mountain Bride.