The Pteranodon kids have a Nature Trackers adventure when they meet Denise Diplodocus, a super-long, super big dinosaur. At first the kids mistake Denise's neck for a snake, and tail as a bridge. Later, Denise amazes the kids, telling them how hard it is for her to raise up her long, heavy neck. Shiny and the others help her raise her neck higher than normal just once, but it feels better for Denise to keep closer to the ground and low-lying trees. Shiny is nervous about Gilbert's impending visit to Pteranodon Terrace. She goes into a cleaning frenzy, wanting everything to look perfect, and her siblings to act perfectly. When Gilbert arrives, everyone starts having fun except Shiny who feels ignored. Soon Gilbert and the other kids persuade Shiny to join them, and they all eat, play, and laugh together.