Starting an Elementary Tech Club

I am looking forward to starting an 8-week tech club at one of the K-4 elementary buildings that I support.  I want to give students the opportunity to choose their own learning path with a guide on the side to assist where needed.  My hope is that by exposing them to various web tools and programs (available via our Windows PCs), they will bring ideas back to their classrooms and ask to incorporate these tools in their projects.

Question:  What is the best way to use web2.0 tools with 9 year-old 4th grade students that do not have email addresses?  If I want to introduce them to tools such as Animoto, Prezi and Voicethread - should I create a generic account and share that login information with the group?  Since I'm hoping that students will work on projects in between our meetings, is it acceptable that they log on with this class account from home?

I'm anxious to hear your thoughts/experiences!