合唱團

合 = 亼 + 口 : Mnemonic symbol: a tube of glue.

In the elevator's kitchen (e2), Hamlet (h) is preparing holiday decorations. He wants to be lazy and cover Halloween as well as Christmas at the same time, so he carved out a mandarin (口) and glued a pointed cap (亼) to its top using a tube of glue (合).

唱 = 口 + 昌 : The lancelet (昌) finds Charlie Chaplin (ch) singing (唱) loudly while taking a shower in the anglepod's bathroom (ang4). The lancelet is extremely annoyed by the singing an stuffs a mandarin (口) into Charlie Chaplin's mouth (口) to make him stop.

团 = 囗 + 才 : Tommy Turtle (tu) inspects the super secret box (囗) in the anthill's kitchen (an2). He's not supposed to open it, but with his super X-ray vision ability (才), he can see that it is filled with balls (团) and dumplings (团).