There are some old favourites but also new courses in making games in Unity and Stencyl. There are several courses just for girls and some interesting electronic courses in addition to the programming ones.
Thinkspace has really been a pioneer in offering such fascinating courses. The good news is, though, that other options are now opening up too. We just got a flyer for CodeCamp.com.au which is running a holiday course on building iPhone apps.
Such a lot of cool opportunities for the school holidays.