Attribution Non-commercial No Derivatives (by-nc-nd)
No Advisories - program content screened and verified.
"Once I had a job ghostwriting for some mathematicians who wanted to make their work more accessible to the general public, and especially to children. We made up puzzles and stories that tangled with infinity, and invented playground games with mathematical strategies underneath. We tried them out in workshops and school visits and overall had that experience of learning more from the kids than we had ever imagined...."
Music by Kevin MacLeod
Date-stamped 10-26-12, but material is not pegged to any particular date or event.