S3, E6: "Best Ever Babysitter"- Buddy, Tiny, Shiny and Don are excited that Keira Chirostenotes gets to babysit them for the night while Mr. and Mrs. Pteranodon go out for a dinner on the Dinosaur Night Train. Keira shows the kids how a dead log's decomposition provides food and shelter for many living creatures. Meanwhile, Mr. and Mrs. Pteranodon are gleeful as they enjoy their date, exploring the Dinosaur Train's other compartments. Mom and Dad return from their date to find their kids filled with more smiles than when they left them and, later, their pillows filled with several of the little bugs from underneath the decomposing log. "Plant A Tree"- The Pteranodon kids are spending the day with Grandma and Grandpa Pteranodon! On the Dinosaur Train on the way to their grandparents', Buddy, Tiny, Shiny and Don learn about sycamore trees. Grandma and Grandpa are so excited to have a whole day with their grandparents and doubly-excited to do a special "project" with them. They bring the kids to a field lined with sycamore trees and show them one tall one in particular that was planted by their Dad when he was a kid! Buddy, Tiny, Shiny and Don get to plant their own sycamore saplings and vow to visit their trees to track their growth as the months and years go by!