Happiness Is a Warm Blanket, Charlie Brown

Linus is obsessed with his blanket; he can't live without it. This becomes a problem when he learns that his blanket-hating grandma is coming for a visit, and she insists that he give it up by the time she leaves, or she'll get rid of it for him! Linus asks for some help to break the habit, but his willpower isn't strong enough. It doesn't help when Lucy makes his blanket into a kite, and it flies away.