Available for free or a small donation! Schools, associations, clubs, ..., who ever needs it, you can download here:
1) Small voluntary donation to:
Disabilities can do great things
3) Download video + quiz: Use the link of this page in the software and you are all set!
If you have difficulty, The files are ready to go with Dropbox or Google Drive, just email me: email@example.com.
New version more friendly to kids will be available!