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).
足
=
龰
+
口
:
Mnemonic symbol: a football. Zapatista Zebra (zu) wants to pimp his football (足) in the space station's kitchen (Ø2). He thinks that a few more vitamins wouldn't hurt, so he extracts the vitamins from a mandarin (口) with a syringe (龰) to inject them into his football.