矮
=
委
+
矢
:
Albert Einstein (Ø) takes part in a darts (矢) tournament in the airplane (ai3), but the airplane's throne is just in the way of his darts, and he is too short (矮) to effectively throw the darts over the throne. Luckily he brought an artificial leg (委) which he can use to shoot the darts.
(classifier used before a noun that has no specific classifier) / (bound form) individual
个
=
丨
+
人
:
Mnemonic symbol: Neanderthal Man (人). Neanderthal Man (人) needs to use the elevator's bathroom (e4) but it's occupied by Guy Fawkes (g), and there's only space for one individual (个). Impatiently Neanderthal Man knocks on the door using his dinosaur bone (丨).
儿
=
丿
+
乚
:
Mnemonic symbol: "son" (儿) sounds similar to "Sun" like in "Sun Wu Kong", so it's gonna be represented by the monkey king. Albert Einstein (Ø-) and Sun Wu Kong (儿) are fighting in the space station's kitchen (-Ø2). Their weapons: Albert Einstein has a shovel (乚), and Sun Wu Kong has a banana (丿).