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The Alphabet Train is the 21st episode of Blue's Clues from season 5.
Joe & Blue are creating an alphabet train, with the help of their friends. There are going to be boxes from A to Z connected to the train and each one will contain something to represent that letter. We help the characters throughout to figure out what they can put it the boxes and also help to make sure everything is in order. Our skidoo trip takes us into a magnet board, where we find every more things for the boxes. Once the train was complete, they join in a song about the alphabet and objects.