Barney T. Dinosaur (or simply just Barney) is a two hundred million year old purple dinosaur, who comes to life through a child's imagination. He is best known for his friendly, optimistic (and even generous) personality and his positive attitude. His theme song is the "Barney Theme Song" (or "Barney is a Dinosaur" to the tune of "Yankee Doodle"). His other well known song is "I Love You," which has been parodied by many people and the tune is sung slowly to "This Old Man". Barney likes most kinds of food, but his favorite is a peanut butter and jelly sandwich, presumably with pumpernickel bread, which is his favorite bread. According to Barney's Campfire Sing-Along, veggies are also a favorite of his.