Baby Bop loses her pet caterpillar. The park turns into an amphitheatre with performing insects.
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! Bugs: Barney and Baby Bop are thrilled when BJ sets up a bug zoo in the caboose but Riff isn't so sure he wants to be around bugs. When the park is magically transformed into a amphitheatre with insects performing, Riff discovers that bugs don't bug him after all.