> And Hamkins shows it can go all the way down to eight-year-olds. At the bottom he mentions his previous visit - Math for seven-year-olds: graph coloring, chr

> And Hamkins shows it can go all the way down to eight-year-olds. At the bottom he mentions his previous visit - Math for seven-year-olds: graph coloring, chromatic numbers, and Eulerian paths and circuits http://jdh.hamkins.org/math-for-seven-year-olds-graph-coloring-chromatic-numbers-eulerian-paths/ http://jdh.hamkins.org/math-for-seven-year-olds-graph-colori...