Sure they do. Also it let’s you fix things. First time I took apart a clock was because the alarm switch got stuck, so I took it apart to clean the gunk out. Eventually took it apart again to clip the wires to the speaker because it regunked and I couldn’t make it stop having the alarm on and didn’t need that functionality for it anymore, in theory that clock still goes off every midnight. People used to fix things in this country, which includes taking them apart and seeing how they work. Then there was the days of Sharper Image who sold a lot of standard household good with see thru plastic cases so you could see the guts. Removes a lot of mystery from life, but also makes it so you can look at that picture and say “yup, that’s a clock, I’ve seen all those parts put together exactly that way before”. Really the fact that he still has the speaker for the alarm is the give away that it’s not a bomb. Also the fact that it barely fits in the box, not really any room for explosives in there. If you want a bomb you need your clock parts to be as small as possible and not waste room.
Well goody for you...but the average person does not take apart clocks to see how they run....
BS.
Most people toss a busted clock out and buy a new one.
And if you want to build a clock, there’s always Edmund’s Scientific.
AND you don’t put it in a suitcase, bring it to school, plug it in, AND THEN LIE ABOUT IT AS IT BUZZES.