Fern's Slumber Party

Summary
At her mother's urging, normally shy Fern tries hosting a slumber party.

Trivia

 * Fern's Dancing Man code message is gibberish, with none of the symbols being ones from the book. She may have planned that for extra confusion.
 * When Fern said, "Maybe that swimming one", the title card is actually the Arthur Underwater title card.
 * This is the first time Jenna speaks in the series.

Errors

 * During the open house, Francine and Arthur are seen in their normal clothes at first, but are dressed up a few seconds later.
 * There are multiple goofs involving the cookies at the open house:
 * At the start, there are eight cookies on the plate, but when the plate is set on the table, the green bush-shaped cookie is not present. The missing cookie then reappears when Francine picks up the plate.
 * Francine gives Arthur a pink cookie, but that same cookie appears on the plate while the other third graders after Arthur are getting their cookies.
 * Francine gives Sue Ellen a green, circular cookie that has two spots on it. Immediately after, Francine gives the same exact cookie to Fern, saying that she is giving it to Fern because she doesn't know what it is. There was only one cookie of that design originally on the plate, and Francine originally had no problem giving the design to Sue Ellen.
 * A green triangle cookie originally appears on the plate, but disappears, even though it was not passed out. This may be the cookie that Sue Ellen was actually planned to get by the crew.
 * A yellow star cookie originally appears on the plate, but disappears, even though it was not passed out to anyone.
 * A white square cookie with an X on it originally appears on the plate, but later on it appears as a white triangle.
 * The Eiffel Tower cookie changes appearance throughout the short sequence, varying in length and exact shape.
 * Buster makes a cameo appearance in this episode, however he left Elwood City in Arthur's Faraway Friend, and does not return home until Buster's Back.

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