I have zero years of experience and I could tell it was a gutted alarm clock.

What rule did he break?

You're aware that Dragnet is entirely fictional, correct?

You should work at TSA

Hoax bombs are illegal.

So could everyone else. That's why they didn't call the bomb squad.

Let me guess, you can read the kids mind and you know for sure he just wanted to impress his teachers with his incredible ability to place a fully assembled clock into a different box.

It wasn't a hoax bomb. It was a clock.

I have worked with them since their inception. What's your point?

TSA hiring, all airports

It was a clock, unti he removed from a clock looking case and put into a case to make clock that also functions as a hoax bomb.

You can't be telling me you think he improved a clock somehow by hiding the display in a closed case and exposing the transformer and making the buttons very difficult to pre.