中研院

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.

研 = 开 + 石 : Maud Younger is lacking salt for her ... . Luckily, there's a salt stone just inside the anthill's kitchen, so she uses a bottle opener to grind off some salt.

院 = 完 + 阝 : The pope (阝) wants to join the cloister (寺院), but first he has to pass Yu the Great's (yu) test. He has to run as fast as he can from Vatikan City to the anthill's bathroom (an4), where the entrance to the cloister is. As he arrives at the bathroom huffing and puffing, Yu the Great is waving with a checkered flag.