第四紀

第 = ⺮ + 弓 + 丨 + 丿 : Dorothy Gale (di) accomplished an awesome result with her composite bow (弓) in the space station's bathroom (Ø4): She shot a banana (丿) onto a dinosaur bone (丨) so the banana was split in half, and then fired a bamboo stick (⺮) into the banana (丿) so the banana was split in half as well. Dorothy is number one (第) with the bow!

四 = 儿 + 囗 : Mnemonic symbol: a four-leaved clover. Socrates (s) is working out in the bathroom of the space station (Ø4). He's lifting four (四) wooden boxes (囗), and wonders why they are so heavy. He doesn't know that inside one of the four boxes, the monkey king (儿) is hiding and secretly laughing at him - until the monkey king comes out and surprises Socrates with a four-leaved clover (四).

纪 = 己 + 纟 : Joan of Arc finds the space station's bathroom full of silken threads. She even cannot accomplish much using a butcher's hook. She knows that the silk worms are responsible and thinks that soon it will be the era of the silk worms.