We started this tradition last year when my oldest was 3. All it takes is a big roll of brown paper and some colorful leaves! Last year I found a beautiful dark gold/brown roll of wrapping paper at the .99 cent store and I traced and cut out my own leaves from construction paper (super time consuming to make 30 leaves that way!). This year I found a roll of brown bulletin board paper for a classroom for just a few dollars at a toy store and bought a package of foam craft leaves from Target for about $5 - not so cheap but waaaay easier!
(You'll have to excuse my funky looking tree - I'm not an artist!) Every day my little guy finds something that he is thankful for and I write in on a leaf. He gets to stick it on the tree! It brings me so much joy to hear what he is thankful for. Towards the end of the month he really has to think and be creative to find new things to put on his leaves - we don't repeat anything for the whole month!
Here is our finished tree at the end of last November...
We get to practice thankfulness and add some colorful decor to our home!