You might have some difficulty fitting thousands of smoke bombs in a small box but let's say for the sake of argument that the box is just large enough to fit 1000 smoke bombs and is sealed tightly enough that no smoke could escape. That means that no air could get in and the smoke bombs would not fully deploy, leaving just enough smoke to fill the box. The laws of physics always balance out.
Given enough time yes, they will decompose. It would take thousands of years for this to happen.
they begin to die, for example if you dont get enough air what will happen to you?
If it is a water-filled or oil-filled radiator, it will leak fluid.
It died out thousands of years ago.
Filled with air
Putting an air-filled balloon in a refrigerator will cause it to shrink.
there would be loots of wood
die die
They grow slower.
his head would expload
That depends if the school is filled with troublemakers about everyday.
It can. But this will only really happen if there is enough moisture in it. This moisture may come from the filling (an oily cream or liquidy berries, for example).