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PreS-Gr 1—This first book in a new series introduces Blippo and Beep, a dynamic duo of friendly robots. Beep tries to tell knock-knock jokes to Blippo, who is unfamiliar with the format. Blippo answers, "Come in!" to Beep's first attempt at a joke. When Beep is finally successful in delivering the joke, Blippo doesn't fully understand the humor. But he ...Log In or Sign Up to Read More