Discovering Fractions with Cuisenaire Rods - Part 2 by Education Unboxed. This is Part 2 in the series of videos showing my daughters doing an activity where they discover fraction rules on their own. In this video, you can see them begin to abstract the concepts once they've understood them in a concrete way. Of course, kids love big numbers so we end up with 1,000,000/2,000,000 at one point!!!