. . . were whittled by Jason from a 100 year oak tree in our back yard. HA! JUST KIDDING! They are cardboard/paper mache block letters from Joann's Craft Store. They are only about $8 a letter and if you find a really good sale you can get them for about $4. I love them cause they are light weight and I don't worry about them falling and hurting our little man.