"Dinosaur Train is seen through the eyes of Buddy, a preschool-aged Tyrannosaurus Rex. Buddy and his adoptive family of Pteranodons go for adventures on the Dinosaur Train to meet all kinds of dinosaurs in different eras and learn fascinating new facts about these incredible creatures." -- iTunes Store
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Great Big Stomping Dinosaur Feet! - Tiny is very worried after she loses Shiny's favorite shiny shell, and enlists Dad and Buddy to help find a new one. Tiny becomes more frantic and stomps around. Then the kids meet Daphne Daspletosaurus who shows the siblings how to make stomping a fun dance instead of an mad romp. / Hornucopia - At the Big Pond, Tank introduces the Pteranodon family to his friend, Stacie Styracosaurus, a fellow Ceratopsian with a crown of elaborate horns on her head. Everyone attends Stacie's "Hornucopia" celebration, where she reveals her new big horns and then performs a moonlit shadow show with her Styracosaurus family.
the fine print: Downloads posted on the Free iTunes Downloads blog are usually free for ~1 week. After that, you'll have to pay for them.