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 home to find their kids filled with more happiness than when they left them and their pillows filled with several little bugs from the decomposing log. The Pteranodon kids are spending the day with Grandma and Grandpa Pteranodon! On the Dinosaur Train trip to their grandparents' place, Buddy, Tiny, Shiny and Don learn about sycamore trees. Grandma and Grandpa are excited to have a whole day with their grandkids and doubly-excited to do a special project with them. They bring the kids to a field lined with sycamore trees and show them a particularly tall one that was - Can you believe it!? - 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 frequently to track their growth over the years!
