Tree cookies are round disks of tree trunk or branch that are created by cutting slices of the tree. These slices are often used as decorations or crafts to showcase the natural beauty of the different rings, colors and textures of the wood. They can also be used for educational purposes to teach about tree identification or to display the history of a tree's growth. Tree cookies are also popular to use as coasters or as bases for candles or other decorative items. They are a natural and environmentally friendly item that can be used in many creative ways.