I'm a math teacher in middle school, in Florence (Italy).
This year I've been using the dynamic geometrical program Cabri with 11-years old students; one hour a week for the whole year.
The students, following the worksheets I prepared, made many different geometrical construnctions and animations.
I've used part of this material to make a video that, I believe, in a few minutes shows the interesting things that can be done using Cabri: