成员国

成 = 万 + 戈 : Mnemonic symbol: a progress bar stuck at 99%.

成 = 万 + 戈 : Charlie Chaplin is queuing at the engine's kitchen, which is blocked by a neuron until the progress bar above shows 100%. Unfortunately it has been stuck at 99% for two hours now. If it doesn't finish soon, Charlie will get completely mad and destroy the neuron himself with his spear.

成 = 万 + 戈 : Mnemonic symbol: a progress bar stuck at 99%.

成 = 万 + 戈 : Charlie Chaplin is queuing at the engine's kitchen, which is blocked by a neuron until the progress bar above shows 100%. Unfortunately it has been stuck at 99% for two hours now. If it doesn't finish soon, Charlie will get completely mad and destroy the neuron himself with his spear.

员 = 口 + 贝 : Mnemonic symbol from 服务员, a waiter.

员 = 口 + 贝 : Yu the Great and a crab are having dinner just inside the anthill's kitchen. They ordered mandarins, and the waiter serves them.

国 = 囗 + 玉 : Mnemonic symbol: a nation's flag. Let's say the Chinese flag.

In the observatory's kitchen (o2) Gitta Giraffe (gu) is practising her ballet performance. She got a whole crate (囗) full of jade bracelets (玉) and flags (国) and fixed one flag to each jade bracelet. This makes a perfect combination for throwing the ring with the flag waving behind it and catching the ring again after a few pirouettes.