Well now that he has the clock constructed it wouldn’t take much to add the fertilizer and have an alarm go off. The first teacher was in the wrong. If you can’t wear patriotic shirts to school or take your Bible, you sure shouldn’t be allowed to bring home made timing device to school.
Would it pass through security at the White House?
And what’s to prevent someone like this kid from having an explosive device surgically implanted? Or just stick it up some handy orifice? Perfect for meeting the president.