How do you build a index card tower out of 50 index cards?

To build an index card tower using 50 cards, start by creating a stable base with two sets of two cards standing upright in a triangular formation, leaning against each other. For each additional layer, place two cards on top of the base at a slight angle, forming a triangle again, and repeat this process for subsequent layers. As you build upwards, ensure each layer is securely balanced before adding more cards. You can also utilize additional cards for cross-bracing to enhance stability.