I built this with my boys (7and 9 years old) so that they could play MMO's, Minecraft, Youtube, Watch DVD's etc. This is my second build from scratch.
First we put the all the motherboard parts together: CPU&Fan, RAM and um... yeah. Then I breadboarded it all together and installed the software and their favorite games on the HDD then took it apart and put it all back in the boxes. Then on Friday afternoon we put it all together and as soon as they snapped the cover on they could fire it up and play games. I did do a bit of cable management for them tonight to make it pretty for the pictures, but they put most everything else together (I did the cpu and some of the tinier screws like the SSD tray).
I left it super simple and stock for starters and spent more money on the nice big case and the modular PSU to make it as easy as possible to build with my kids. It will also provide for fun projects in the future as we upgrade the cpu fan/heatsink and overclock, put in a crossfired 6670, more HDD's for media and backups, etc, etc. In the meantime, with no tweaking beyond installing the drivers and forcing the mobo to recognize the speed of the RAM, we can play all of our games on at least low-mediumish settings with great frame rates (sorry, I don't know how to benchmark that stuff... yet).
The price it shows is incorrect, as the prices have already all shifted. I ended up paying about $670 for everything including OS and monitor. Anybody thinking about about a build like this for their kids could do it for under $550 with a more inexpensive case, smaller non-modular PSU and conventional HDD.
The only problem I had was the when I was test booting the system on the breadboard with just the cpu/mobo/RAM I was getting five post beeps. Even though I was getting to the bios screen, I was reading that 5 beeps mean your motherboard could be fried etc. After a whole night of searching and trying and searching some more, fsbain, who built this, said that he had the same problem and that it just goes away once you have the whole system together. I proceeded putting the rest of the system together (going with unconfirmed windows until I knew everything was working) and it's been flawless ever since.
We're all very happy. I can't tell you how fun it is to get to finally play MMO's with my kids =D Can't wait to build the next one so all three of us can play together!
Thanks to all who helped!