Butterflies - Baby Bop is sad because she lost her pet caterpillar, Monty. Barney and the others try to help her find it. Baby Bop is surprised to discover Monty inside a chrysalis. Everyone is excited to find Monty-now a beautiful butterfly! The Nature of Things - Rachel enters the park and carelessly throws her trash on the ground. Later, when she falls asleep in the caboose, she has a dream that the park animals can talk. Through the animals' and Barney's help, Rachel learns that the park is home to many creatures. She learns the importance of nature and of keeping our earth clean!