古字

古 = 十 + 口 : Mnemonic symbol: at least on German maps, this character actually resembles a cloister.

Oh no! Gitta Giraffe (gu) found that the golden cross (十) broke off of the cloister (古) in the space station's living room (Ø3)! She skewers a mandarin (口) on top of the cloister so that she can skewer the broken off cross back on to fix it.

字 = 子 + 宀 : Zorro got a new task from mission control: he is to have an egg standing on its tip. Zorro thinks smart and remembers the egg of Columbus, so he puts the egg in a graduation cap as egg cup and ditches one end of the egg with a huge printing letter. Unfortunately the egg wasn't boiled and there is no gravity, so he messes up the whole bathroom. Mission control can't stop laughing since all they wanted was to fool Zorro into this trick.