横三竖四

横 = 木 + 黄 : Hamlet (h) climbed on the beam (横) of the engine's kitchen ((e)ng2) and now he is too afraid to come down again. If the Yellow Emperor (黄) doesn't want to call the fire brigade, for better or worse he'll have to climb the Christmas Tree (木) to pick Hamlet up.

三 = 一 + 二 : Mnemonic symbol: a Cartesian coordinate system with three (三) axes.

Socrates (s-) is performing in front of the anthill (-an1). He created an electrical flute by attaching a large capacitor (二) to the flute (一), so that he can get the attention of all the ants. Moreover, he's balancing on a Cartesian coordinate system (三). Unfortunately, only three (三) ants stop to watch the performance.

竖 = 収 + 立 : In the space station's bathroom (Ø4) Sheldon Shrimp (shu) is experimenting with different ways of putting a radio (収) on top of a vase (立) in order to use the vase as resonating body to improve the sound quality. In the end he decides that the best way to put the radio is to set it up vertically (竖).

四 = 儿 + 囗 : Mnemonic symbol: a four-leaved clover. Socrates (s) is working out in the bathroom of the space station (Ø4). He's lifting four (四) wooden boxes (囗), and wonders why they are so heavy. He doesn't know that inside one of the four boxes, the monkey king (儿) is hiding and secretly laughing at him - until the monkey king comes out and surprises Socrates with a four-leaved clover (四).