3-7: GCompris (http://gcompris.net/-en-) *** Best ***, KDE Education software (http://edu.kde.org/), Tux Software Series (http://tux4kids.alioth.debian.org/), TuxPaint, TuxMath, TuxType all excellent, Omnitux (overlaps with Gcompris) (http://omnitux.sourceforge.net/), SuperTuxCart (no education just game) (http://supertuxkart.sourceforge.net/), SuperTux(http://supertux.lethargik.org/) (entertainment only), Secret Maryo (similar to Super Mario, pure entertainment, no educational value) (http://www.secretmaryo.org/), Frozen Bubbles (pure game, no real education here)(http://www.frozen-bubble.org/), Crayon Physics Deluxe (commercial, puzzle game)(http://www.crayonphysics.com/)
6-14: Scratch (teaches computer programming in an amazingly intuitive way..had 11 year old figure it out with no computer background and no experience) (http://scratch.mit.edu/), Alice (teaches 3d art), (http://www.alice.org/index.php?page=downloads/download_alice), World Of Goo (commercial, puzzle solving)(http://www.2dboy.com ), Trine/Trine 2 (commercial, puzzle solving)(http://http://trine-thegame.com/site/) (good for developing puzzle solving skills..good graphics), Greenfoot (teaches Java to pre-teens similar way to Scratch) (http://www.greenfoot.org/door), Cogs (Commercial puzzle game) (http://www.cogsgame.com/), DreamChess (Stragety...its chess)(http://www.dreamchess.org/), E-Adventure (teaches people to make their own point/click adventure games) (http://e-adventure.e-ucm.es/), Gbrainy (Math/logic games) (https://live.gnome.org/gbrainy), Inkscape (Vector Graphics..works well with Scratch/Alice as teaching tool and book)(http://www.inkscape.org), And Yet It Moves (Commercial puzzle/alternative physics) (http://www.andyetitmoves.net/), Machinarium (Commercial, flash adventure game..great for kids) http://machinarium.net/demo/, Minecraft (semi-commercial, install on Linux may not be straightforward) (https://minecraft.net/), Botanicula (Commercial, Flash adventure Game)(http://botanicula.net/)
Most of the non-commercial games listed above are readily available hrough the software game channels of most Linux Distros including Ubuntu, Mint (I've confirmed all on Mint), Fedora and Debian. I included links in case for some reason the user friendly Software Install Dialogs in Ubuntu/Mint or default Synpatic Package manager channel configuration doesn't do the trick. The commercial ones come in various installers, most user friendly but a few you may need to make a menu launcher manually.
Children specific OS Distros: I've never tried these but it may simplify your OS installations with pre-installed game/activities: http://www.doudoulinux.org/web/english/index.html ***(this looks VERY good for kindergarden first timers on a computer)*** http://www.qimo4kids.com/what-is-qimo/ http://www.edubuntu.org/ http://www.foresightlinux.org/release/foresight-kids-edition-1-0-release-notes/
Recommend all purposes Distro for early starters (6-and up): http://www.linuxmint.org/ (Not education specific but software installation menus make it easy to find/try educational and non-educational games...ubuntu does to but Mint makes it easier for non-techies...have 9-12 year old using it with no training...no problem)
other list of games for Linux are here: http://www.linuxlinks.com/article/20080510052539217/Games.html http://www.linuxlinks.com/article/20080522164112313/Games-Part2.html
While educating your kids on computers hopefully people don't forget that kids need to play outdoors too and get dirty early in life. (Helps prevent peanut allergies I'm told)
Linux Minx uses default search engines of those who contribute money to the OS to generate revenue and I find that perfectly acceptable. You can also add the bigger search engines with ease and its no more intrusive than MS IE 7/8's default search engine.
I feel as if Ubuntu is pushing the limits of including "features" in a similar way Microsoft did in stages: first with WGA in XP, then with the Protected Media Path and its "dial home" feature under the pretense of telling you "you are online" with the "Network Connectivity Status Indicator" (which dials to www.msftncsi.com and can only be disabled with a registry hack as there is no admin interface to change this behavior). MS is playing similar games with MS Office: WGA-like "features", the "ribbon" interface everyone HATES (pushing many to Libre/Open Office), and dramatic price increases to push home/SMB users to buy the cloud subscription model via Office 360. These "features" are of no benefit to the user, are often a detriment (especially to privacy) and/or consume excessive resources at a minimum. The WGA with XP was enough to drive me to Linux and I've been very happy with my move.
The Unity issues are piling up and this new one may hurt Linux advancement in general. I'm certain it will hurt Ubuntu acceptance with the informed Linux community. there are alternatives. Its starting to look as though Ubuntu's previous popularity has made it a bit arrogant and complacent with its user base, similar to Microsoft and Apple. While some may correctly argue that fragmentation can hurt Linux, in some ways its also its strength, so long as core standards aren't broken. This could be a clear example.
My opinion is if you have a good team/company and you can live comfortably, that is ideal and to throw something like that away for 10% increase in salary is selling yourself cheap. That is my 2-cents.
"The mass of men live their lives in quiet disperation" - Henry David Thoreau.
Translation: Most people hate their jobs and their lives. This is true today. Why join such a miserable majority?
Technically not ALL music is has copyright. Thank goodness the great composers of the last few hundred years didn't have this blood sucking legal mumbo jumbo. Perhaps that is yet another reason Mozart, Bach (and many other greats from the 1600-1800s) were consider great; you didn't need a lawyer to enjoy it. LOL
try Canada. Not perfect, but life's good up here medically.