damn, the Crazy Train intro would scare the crap out of my cats and all of my family members if played at 4 am lol. But I like they way you think lol

>he baby songs can be replaced with airplane noises, or truck noises from other toys?

This is exactly my kind of thinking. Was trying to think of some sort of toy with lights and stuff. Alexa also crossed my mind. I can play on alexa sounds triggered by motion and stuff so it's definitely on my list of potential tools for this task.

I am a real man. It has to be complicated and has a high chance of failure. But it will be fun and I will be very proud of myself if it works.

These guys can jump very high. This would need to be a big gate.

One of the reasons I want to "scare" them is because I believe that after few weeks they will just learn to avoid being over there when we sleep. I will keep doing that with a hairdryer as this seems to work but I was hopping building a more elegant solution and since I like tinkering I thought this could be a fun project.

Right now I am thinking a small fan with a piece thin plastic mounted so blades will be hittting it making extra noise. Plus blue/red spinning light?

>g my cats at 10am and 10pm so that they aren’t hun

Interesting idea. We might try that but I think it's not hunger. It's the young blood. They are 1.5 years old so they just bored and want to have fun. I don't blame them

Not bad but this will make much more noise than cats. But yeah, it would scary away them at least for the time of cleaning :)