I remember at 3-years-old that I took endless mischievous joy in figuring out how to change the channel of a Healthkit TV* with an ultrasonic remote control sys

I remember at 3-years-old that I took endless mischievous joy in figuring out how to change the channel of a Healthkit TV* with an ultrasonic remote control system by furiously jangling keys. *My father and grandfather built it together.