秀外惠中

秀 = 乃 + 禾 : Mnemonic symbol: a talent show.

Marie Curie (xi) is preparing for her performance (秀) in a talent show (秀) in the outhouse's bathroom (ou4). She will be juggling lots of bowls of cereals (禾) without spilling the cereals. Her secret is that she convinced a poltergeist (乃) to help her, which will make itself invisible during the show and handle the cereals for her.

外 = 夕 + 卜 : There's a hole in the wall of the airplane's bathroom (ai4), and from outside (外), a bat (夕) wants to enter. Willy Walrus (w) is very afraid of bats, so he does his best to hinder the bat from entering with a voodoo staff (卜).

惠 = 二 + 虫 + 心 : Mnemonic symbol: a patron.

Helgar Horse (hu) used to be an accomplished racing horse, but nowadays she gets too old. Her patron (惠)—the mosquito (虫)—however wants her to continue, so he adds a capacitor (二) to her heart (心) in the Eiffel Tower's bathroom (ei4) to make her run even faster.

惠 = 二 + 虫 + 心 : Mnemonic symbol: a patron.

Helgar Horse (hu) used to be an accomplished racing horse, but nowadays she gets too old. Her patron (惠)—the mosquito (虫)—however wants her to continue, so he adds a capacitor (二) to her heart (心) in the Eiffel Tower's bathroom (ei4) to make her run even faster.

中 = 丨 + 口 : Mnemonic symbol: a dart board, because you always try to hit the center.

Julian Giant Squid (zhu-) is throwing dinosaur bones (丨) as darts on a dart board in front of the engine ((e)ng1). To make it a bit more difficult he's throwing mandarins (口) into the air as well and skewers them up right in the center (中 is a mandarin skewered on a dinosaur bone) in mid flight with the dinosaur bones. He's still able to consistently hit the center (中) of the dart board.