You will need red/yellow counting disks for this activity. 1. Shake up your red/yellow counting disks in a cup and toss them on your work area. 2. Figure out how many red ornaments you will need and how many yellow ornaments you will need based on the colors of the disks. 3. Move the correct numbers of colored ornaments onto the Christmas tree. 4. Use the to talk about your learning. 5. Press the x2 when you are done.