充实

充 = 亠 + 允 : Mnemonic symbol: a charger for your mobile phone. Chantal Chicken (chu) has to charge her mobile phone, but the only charger (充) is outside in front of the engine ((e)ng1). Without any better option she waits outside in the cold wind for her phone to charge until she gets a runny nose (允). Lacking tissues she has to blow her nose into her beret (亠).

实 = 头 + 宀 : Sherlock Holmes welcomes professor Skull just inside the entrance of the space station. Professor Skull has not a complete head but only a skull, and a solid understanding of solid state physics. She really is an honest person and still wears her graduation cap.