Complex sentence: The Guppies do something fun which can determine another important character and leads Mr. Grouper talking more about the topic, which leads into a dancing song; though the order of the songs varies from episode to episode.
Split into simpler sentences: The Guppies do something fun which can determine another important character and leads Mr. Grouper talking more about the topic, which leads into a dancing song. The order of the songs varies from episode to episode.