Watch Arthur online: Episode 10 D.W. Goes to Washington / Arthur's Mystery Envelope

A).It's the 1st family trip and Arthur gets to choose. He chooses going to Washington, D.C. and D.W. thinks that she's going to be bored until she accidentally runs into the president of U.S.A. B).Arthur gets an envelope from Mr.Haney to give to his mom but he's afraid that there's something bad in it!

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