Prop for Teaching Undue Influence
The Papyrus company sells a nifty birthday card, The Google-Eyed Hypnotist, which can be used in the process of teaching undue influence.
The card shows a man dressed in 1950-esq clothing with a machine that spins a supposedly trance-inducing wheel. When you tilt the card, the wheel appears to spin revealing the subliminal message “Put Me in Your Will.”