A childhood belief about family

As told by my mother.
When my sister was young, she was very bad and got into everything but one day they found out a way to contain her. How? Babypowder. For some reason she was deathly afraid of the white powdery substance and wouldnt go anear it. So my uncle or whomever would put babypowder to keep her out of the kitchen and once even confinded to a chair and she never left the chair not once. Thank god she isnt afraid of babypowder now though. Would be kinda funny still.