之字形

之 = 丶 + Z : Mnemonic symbol: Sooo sleepy... "zZz" (the character looks like a "Z"). James II of England (zh) fell asleep in front of the space station (Ø1). He sleeps on a big petal leaf (丶), making loud "zZz" (之) sounds.

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.

形 = 开 + 彡 : Marie Curie (xi) is modding her fake Santa Clause beard (彡) into a new shape (形). With a bottle opener (开) she carves the beard in the engine's kitchen ((e)ng2) so that it gets a fractal (形) shape (形).