Ten Things You Can Do to Celebrate Arbor Day December 22, 2015By Betty Munis10. Learn how Arbor Day began.9. Find out about Idaho’s state tree, the Western White Pine..8. Buy a forest license plate and support forest education programs.7.Learn how paper is made and try it with your friends or family.6. Proudly wear an official Idaho Arbor Day T-Shirt.5. Learn about all the neat things we get from trees.4. Learn how to identify trees and impress your friends.3. Send an Arbor Day e-card to your friends and family.2. Share your tree planting experience on IFPC’s Facebook page1. Plant a Tree.