Sagwa (http://pbskids.org/sagwa/index.html)

With charming characters and fun activities, this site provides kids with a nice introduction to Chinese culture and customs. There are some super-simple games for little kids, such as Counting Koi, while puzzle games like Tangrams will challenge older kids -- and possibly their parents! There's no age guide to the games, so there may be a bit of trial and error involved in finding the right fit. Nevertheless, the games are nicely animated and do a good job teaching a range of skills.