How To Control Multiple Computers Simultaneously/not Switching

I know nothing about computers compared to most on this site, but I have loved majorgeeks since 2005. Can anyone tell me how to control multiple computers at the same time, and I don't mean switching from one screen to the next, I mean if I open a website on my computer and download a file, or even if I play minesweeper, it would duplicate my actions on my computer on 30 different computers? Again, I don't want to switch from one computer to another with one mouse and keyboard, I want to be able to draw, type, open files, play basic games on my computer, and have it simultaneously done on 30 different computers at the same time. I want to be able to control 30 different computers remotely or even in the same network if I had a computer lab set up, as if it were the one I was using.

 

http://www.huintech.com/product/detail?id=2
KMS-200 This product is designed to transmit USB Keyboard and USB Mouse data to two PC simultaneously.

This splitter can control multiple Computers with a single USB Keyboard and Mouse at the same time
Via daisy chaining it is possible multiple PC control Max 20 PCs