I recently gave a lunchtime talk at a MathCounts competition, aimed at 6-9th graders, and I propped up my camera to take a low tech recording of the thing. The talk went quite well, and I want to post it here.

The title of the talk is “Anything worth doing is worth doing twice.” It’s about Sierpinski’s triangle (to the left), a beautiful and profound mathematical object, and how the different ways to construct the shape have yielded astonishing connections between different areas in mathematics (listen for the gasps from the audience).

Let me know what you think!