易县

易 = 勿 + 日 : Mnemonic symbol: a really easy puzzle consisting of only two parts.

Maud Younger (y) and the sun (日) are trying to complete a really easy puzzle (易) in the space station's bathroom (Ø4). It's not as easy as they thought though, because in zero gravity they can only move with the help of their bat wings (勿).

县 = 且 + 厶 : Marie Curie (xi) and the county manager of her home county are manufacturing maps of her home county (县) inside of the anthill's bathroom (an4). The county has a very special form which you can reproduce by smashing a fake nose (厶) with a shelf (且).