空空如也

空 = 工 + 穴 : Mnemonic symbol: an air conditioner

空 = 工 + 穴 : In front of the engine, Karl Koala found some very special cave paintings. Using steel beams he constructs a protective cover. He also installs air conditioning to make the best environment possible to preserve the cave paintings.

如 = 口 + 女 : Mnemonic symbol: Asif ibn Barkhiya, according to the Qur'an, throne hauler at the court of king Salomon.

如 = 口 + 女 : Just inside the space station's entrance, Asif ibn Barkhiya, Rachel Rhinoceros and Bessie Coleman are playing monkey, throwing a mandarin as if they were little kids.

也 = ㇆ + 丨 + 乚 : Mnemonic symbol: an excavator. A plow and a shovel are both tools for moving earth, and an excavator can be used to dig up dinosaur bones.

Maud Younger (y) is digging for dinosaur bones (丨) in the elevator's living room (e3). First she used a plow (㇆) to destroy the floor, then she used an excavator (也) to pull out the dinosaur bone surrounded by lots of earth. Finally she uses a shovel (乚) to remove the remaining earth manually so as to not damage the precious dinosaur bone. (The stroke order is ㇆丨乚)

也 = 乜 + 丨 : Maud Younger (y) wants to split a dinosaur bone (丨) in half in the elevator's living room (e3) using the shovel of an excavator (也). She has to squint (乜) her eyes to precisely hit the center point of the dinosaur bone.