This website is really great for having some fun with dialectics (something people don't often understand or are hard to explain to folks)

http://home.igc.org/~venceremos/index.htm

Why are dialectics important? - you might ask

"Dialectics is the theory of knowledge of... Marxism."

Lenin, Philosophical Notebooks, "On the Question of Dialectics", 1915, CW, Vol.38, p.362


"The application of materialist dialectics to the reshaping of all political economy from its foundation up, its application to history, natural science, philosophy and to the policy and tactics of the working class - that was what interested Marx and Engels most of all, that is where they contributed what was most essential and new, and that was what constituted the masterly advance they made in the history of revolutionary thought."

Lenin, The Marx-Engels Correspondence, 1913, CW, Vol.19, p.554