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When Arthur discovers that Grandma Thora is a marbles champion, he trains with her so he can beat all his friends. And though Thora teaches Arthur everything he knows, she doesn't teach him everything she knows.
First Air Date : Oct 07, 1996
Last Air date : Feb 21, 2022
Episode : 493 Episode
Season : 25 Season
Runtime: 13:14 minutes
Studio: PBS
Country: Canada, United States of America