理工男

理 = 王 + 里 : Li Qingzhao and Martin Luther King have the mission to find out the intrinsic order and inner essence of sunflowers in the space station. They grow a few sunflowers and care for them very meticulously, talking to them and everything.

工 = 二 + 丨 : Mnemonic symbol: a steel beam, since 工 looks like the cross section of a steel beam. In front of the engine ((e)ng1), Gitta Giraffe (gu) is doing some hard work: She's stacking a capacitor (二) on a dinosaur bone (丨) on a capacitor (二). She's not very successful, but then she gets the idea to use steel beams (工) as support.

男 = 力 + 田 : Mnemonic symbol: a mankini.

Napoleon (n) is taking part in the iron-man contest. In the anthill's kitchen (an2) he has to rob through a muddy field (田) as fast as possible while wearing a mankini (男). He has to reach a power button (力) located at the other end of the field and push it as fast as possible to qualify for the next round.