Hi,
It so happens I'm part of the team that make these particular pens:). Let me know if you need an assist with anything. They can be a little tricky to set up if you're new to it, however, as with anything technological, you learn quickly and there are schools, internationally, implementing the wiimote project concept. Some advice we give is to visit many of the forums discussing it. One of particular note is at wiimoteproject com
Hope this helps but feel free to send me an email if you require any other info.
Funny enough the chap that helped design and build our pens is an ICT teacher at a college in Dover. He may be able to give you some advice if you need any from a teachers perspective.
Good luck.
