How is a Fraggle born? Where do Fraggles come from?

[TheRealFraggle]

They hatch from eggs, as mentioned by the Storyteller in "The Terrible Tunnel". I never thought about the ages of the main characters much but they seem more like young adults to me, except for maybe Red and Wembley.

 

[TrinityCarnival]

Had a random thought:
Sea Lions have tiny outer ears... would it make sense for Fraggle to have the same?
Sincerely a fan doing an AU for our own enjoyment and looking for ideas to draw.