工读

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.

读 = 卖 + 讠 : Doggy Dog finds an advertising column just inside the space station's entrance. He finds out that it's for sale: There is an price tag attached to it. He reads the price tag aloud: "woof woof woof woof!"