中
=
丨
+
口
:
Mnemonic symbol: a dart board, because you always try to hit the center.
Julian Giant Squid (zhu-) is throwing dinosaur bones (丨) as darts on a dart board in front of the engine ((e)ng1). To make it a bit more difficult he's throwing mandarins (口) into the air as well and skewers them up right in the center (中 is a mandarin skewered on a dinosaur bone) in mid flight with the dinosaur bones. He's still able to consistently hit the center (中) of the dart board.
笔
=
⺮
+
毛
:
Brunhilde (bi) decided to try art for a change and constructs a brush (笔) in the space station (Ø3). She cuts off her long hair (毛) and attaches it to a bamboo stick (⺮) to make her brush (笔).