Consider getting [link|http://www.mame.net|MAME] and then visiting that [link|http://www.mame.dk|ROM site] before it gets shut down or buy a disk full of arcade ROMs.

Have your children learn the games you used to play as a youth without them spending a pocket full of quarters (or whatever coins your area takes, tokens?) to learn from the games.

The Neo*Geo games are about the best, and any made after 1997 have those 3D graphics that only a Pentium II/Celeron or AMD Althon/Duron or faster can handle. Just be aware that some games have a lot of violence in them (as if that ever stopped any other kid from playing it?) and a few of them are adult related.

But pile up on the ROMs if you can. MAME exists for Windows, OS/2, Linux, BeOS, MacOS, MacOSX, FreeBSD/NetBSD, AmigaDOS/AmigaOS, and many other platforms.

Even Pacman can teach hand/eye co-ordination and maze navigation. :)