万古长青

万 = 丆 + ㇆ : As mnemonic symbol I choose a neuron, since each neuron is said to connect to 10000 others.

万 = 丆 + ㇆ : Willy Walrus needs to dig up the floor in the anthill's bathroom, but he is tired of doing so manually with a plough. To make his life easier, he sets up a wind wheel for electricity, connects a neuron to the wind wheel and the plough to transmit the electricity and uses his new DIY electric plough to dig much faster.

古 = 十 + 口 : Mnemonic symbol: at least on German maps, this character actually resembles a cloister.

Oh no! Gitta Giraffe (gu) found that the golden cross (十) broke off of the cloister (古) in the space station's living room (Ø3)! She skewers a mandarin (口) on top of the cloister so that she can skewer the broken off cross back on to fix it.

长 = 乛 + 丆 + 丿 : Charlie Chaplin sped into the anglepod riding his longboard, but in the kitchen he doesn't know how to stop. He manages to make a u-turn by hooking him to the pole of a wind wheel with a sickle, but after the turn he can't help but bump into a giant banana.

长 = 乛 + 丆 + 丿 : The chief (长) is asking James II of England (zh) for help, because his wind wheel (丆) in the anglepod's living room (丆) isn't performing very well. After finding out that there's too much friction, James II of England uses a sickle (乛) to cut open a banana (丿) and uses the pulp to grease the wind wheel and enhance (长) its performance.

青 = 龶 + 月 : Mnemonic symbol: a cyan-colored fountain of youth.

青 = 龶 + 月 : The moon opened a very profitable start-up in front of the engine. He put up a fountain of youth and--wearing a fancy headdress--charges the Queen of Hearts a fortune for drinking from the fountain.