月
=
⺆
+
二
:
Yu the Great (yu) is modelling a moon (月) in the elevator's bathroom (e4). He uses a stapler (⺆) to staple a lot of capacitors (二) together to form a moon shape, while the real moon is sitting for him.
束
=
口
+
木
:
Mnemonic symbol: a bundle of firewood.
In the space station's bathroom (Ø4), Sheldon Shrimp (shu) built a stage out of bundles of firewood (束) to put his Christmas tree (木) on. Under the tree he put his favourite food: mandarins (口).