When teachers are looking for that new, exciting and interesting mathematics acitivity that will challenge and extend their learners, then the internet is a good place to look. Many teachers, resource developers and 'net trawlers' have developed, checked out and tried some of the excellent games and interactive applets to choose from. Take some time to go through what is available and add just two or three to a favourites folder to use with your class. Choosing too many will make it hard for children to select and use.