I’ve carried a set of leather wrapped juggling balls on flights off and on since the 90’s. They used to make every X-ray reader twitch out. They’re about the right size for bad items (explosives, grenades), and I have three, not just one.
Normally it would get a quick search, a moment of confusion, and then no worries.
Once when going through the old airport in Berlin, I got searched at the second checkpoint, they brought out the balls to me, so I started juggling them and did a routine. It was really quiet so I was the only passenger in sight. That was the only time I’ve performed in front of an audience who was carrying machine guns.