亻
=
丿
+
丨
:
Mnemonic symbol: Rosa Luxemburg. She's quite radical, and her name starts with "r", just like "ren2". Also, 亻appears at the left-hand side of characters, and Rosa is a leftist as well.
Robinson Crusoe (r) and Rosa Luxemburg (亻) are having their favorite snacks in the encampment's kitchen: Rosa is eating a banana (丿) and Robinson is eating a dinosaur bone (丨).
扇
=
户
+
羽
:
Sherlock Holmes (sh) tries to escape the summer heat in the anthill's bathroom (an4). He makes a fan (扇) by attaching a lot of feathers (羽) to a swinging door (户) and fans some fresh air towards himself.