Too many people running about in a blind panic in the "land of the brave"...
"he brought the clock – a simple project housed in a pencil case – to show his engineering teacher. When the clock was seen by another teacher, school administrators and police were called in and the young man was eventually led away in handcuffs."
Given the "other" teacher and administrators were obviously complete ignorami, why didn't anyone think to ask the engineering teacher to have a quick look before they started calling the feds?
Or maybe a chemistry teacher (who I hope would be able to spot a lump of possible explosive)... Or anyone who doesn't get their entire world view from hollywood?
Honestly, it's mains powered, it doesn't even have a nice cluster of cylindrical batteries to *vaguely* represent the stereotypical 6 dynamite sticks... It's less likely to explode than a mobile phone on a cheap Chinese knock-off charger!
So who fancies sending the school a present?