同構

同 = 冂 + 𠮛 : Tommy Turtle (tu) is stapling (冂) a magical scroll (𠮛) to the wall of the engine's kitchen ((e)ng2). On it he wrote that he's looking for two twins (mnemonic symbol for 同).

构 = 勾 + 木 : Guy Fawkes (g) wants to measure the crystal structure (构) of the Christmas tree (木) in the outhouse's bathroom (ou4), so he first draws a comic (勾) to find which would be the optimal crystallization superstructure.