April Fool! watch out at school!

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On April Fools' Day, Gilbert is unhappy that everyone is tricking him and he is unable to get them back, but then he thinks of a great way to fool his best friend. Includes tricks hidden in the illustrations for the reader to find.
FictionPicture puzzlesPractical jokesApril Fools' DaySchoolsGilbert (Fictitious character : De Groat)Juvenile fictionChildren's fictionApril fools' day, fictionSchools, fictionWit and humor