Free games for kids to teach math and logic

Wow - my kid came home from school raving about this site. I went to check it out and promptly lost 45 minutes playing...
Now, be warned - the site is in French but is graphic based - you should be able to find something you like and that your kids enjoy in no time at all.
It's educational, too! Really, you won't believe how much time your kid will enjoy learning when it's presented with color and fun.

GoMaths - educational math and logic games for kids

Traffic Jam
- this is the game I lost all the time on... I never would have known what to do without my kids so I'll tell you. You have to get the red car out the door. Move the other vehicles blocking the way - they only move back and forth in the direction they are pointing. You'll need to rearrange the other vehicles in order to provide a clear path for the little red car. Play with your child for the first 5 minutes and you'll find them instructing you. This will be followed quickly by "here, let me do it" at which point you lose all input. If this time works out to sneak away and make Oppycakes for days' worth of healthy eating, you're ahead of the game.

Of course, if you want to take a nice bubble bath, too, I won't tell. You deserve it.