Andy is a character who only appeared in Barney's Musical Castle, the respective book adaptation and Barney's Greatest Hits - Live On Stage, in which the latter contained a portion of Barney's Musical Castle. He was portrayed by Fernando Jorge Moguel in the original run of Barney's Musical Castle. In Barney's Greatest Hits - Live On Stage, he was portrayed by Zachary Webster.
Andy and the other children were making flags for their sandcastle when all of a sudden a big sign with a castle came along. Andy thinks that the sign wanted to show them to a real castle. It was Andy's desire to even see a king. Eventually he and the other make their way to The Enchanted Forest, following the sign. Eventually they find a crown and Andy makes the point that perhaps the King lost his crown. Andy and the others eventually make their way to the castle. Andy points out to Barney that there's a guard at the entrance. Andy mentions to the guard that the king probably wants his crown back. The guard eventually helps everyone get inside the castle to return the crown back to the king.
Once the second act of the show starts, Andy and the other children ride in on horses and eventually return them to their stables. Once inside the castle, Andy notices that the King is missing and questions as to where he is. Andy joins the others in search of the king within the castle. They eventually look in metal suits, and Barney informs Andy that they wore metal suits made of armor back in the day. For Andy, the metal suits looked heavy, to which Barney suggests that it might be heavy. Andy and the others soon play dress up with the King's clothes and eventually meet him at the top of the castle.
Once they meet the king at the top of the castle, Barney makes the introductions, even introducing Andy to the king. Barney soon wonders as to who has the crown so they can give it to the King. Andy mentions that Jessica was carrying it, to which she says that she gave it to Baby Bop. Eventually, the King receives his crown back.