Those vent holes make it easy to attach them to each other using bolts. You’ll probably want a mix of long and short ones so you can attach them facing in different directions easily.

If you use wire to connect them you could make some sort of tensegrity tower.

I second the custom computer case idea. Or if you get that PS3 you could rebrand it Dell.

Do you have a key for the locks? Also, the light tent would have dispersed that highlight that made me have to google for another picture of the thing to see if that was a lock or not.

Build a bridge.

Build a robot that throws them at lines on the ground in order to calculate pi.

Your desk has a glass top, maybe you could tile these underneath it, but I don’t think it would look that great.

Make a potato cannon with a barrel precisely shaped to fire them.

It would be pretty easy to attach them in a neat looking spiral, but I don’t know what you would do from there.