I will forever remember using the magnet that came with this old Klutz book near the TV in my parents' room when I was around 10 and noticing the rainbow pattern it made in the picture. And then, after further investigation and experimentation, noticing those colors stopped going away when I moved the magnet away. And then, never speaking a word of it. For, like, 40 years.

When Bill Burr's Netflix cartoon show put a similar bit in an episode it finally dawned on me that lots of kids must have messed up their parents' TVs with those magnet wands.