Here is the link to the last two years that we posted here on instructables
Alternative Christmas Tree 2011
Alternative Christmas Tree 2010
Step 1: Building the Tree
We pulled them out cleaned them off & started stacking. We went through a myriad of design ideas, stacking the chairs a number of ways. & attempting to come up with an attachment method that wouldn't ruin the chairs.
We settled on a design created by our older son.