Question about Tomtar

Hej my dear alter Schwede! I’m fascinated about folklore, cultures and anthropology, and specifically interested legends and (fantastic?) beings. I’d love to learn more about Tomtar in your culture, that is, about their real impact in everyday life and traditions. Maybe share some childhood memories ? Stories your grandmas would tell you?

, please let me know if there are any specific places around downtown Stockholm to learn and experience more about this?