Online games for pre-schoolers?

A mum asked me if I know of any good, fun, safe and educational games websites for her 4yo aside from Cbeebies and NickJr - recommendations and links please?

I was going to say cbeebies.....................

Just googled it and came up with this

http://www.littlekidsgamesonline.com...ine-games.html

Miffy xx

My little one loves http://www.kneebouncers.com/

Thanks for these