This edition to the Tractor Mac series is a board book that teaches children about the different colors of the rainbow. Tractor Mac and his vehicle and animal friends, including Sibley the horse, Pete the pig, and Goat Walter, show kids around Stony Meadow Farm in order to observe the colors of various objects found on the farm. | Tractor Mac Colors On The Farm by Billy Steers, Board Book | Indigo Chapters