Round the Twist (1990)

Season 1: Episode 6

After an accident, Linda ends up with a broken nose. She dreams of her nose being big, so she escapes to the country with her Aunt Tuneless (who resembles Nell), where she discovers that anyone who plays ""The Wild Colonial Boy"" on a gumleaf from a certain tree can pass illness's onto others. She discovers this after Aunt Tuneless uses it against Foxy(who resembles Mr. Gribble, and has a son that looks like Gribble junior)