imac neck
The new iMacs neck is incredably sturdy. Apple even suggests that for short distance carrying that you hold it by the neck! And you guys know Apple, its practically voiding your warranty just to take most computers out of the box, hehehe. Anyway, I would worry about a new iMac in a room with a bunch of kids. I'm sure Apple wouldn't release a computer they wanted to get into schools without making sure it could stand the abuse. Also, if you were a kid it would seem like a dream to walk into a room full of iMacs. Just to get the priveldge of sitting down in front of one would make you sit up straight and behave. Of course though, I imagine that if you wanted to break one, just like any other computer, I'm sure you could.