Communication Drills presents three interactive prototypes built with D3.js and Glitch-hosted HTML/JavaScript. The first, Surprise, animates a force-directed network using `d3.forceSimulation` with drag and collision detection. Hourly Rate Calculator computes and visually updates a cost breakdown in real time as users adjust sliders, relying on D3’s data binding and transition methods. Live Search filters a dataset through an input field, redrawing a bar chart with `d3.select` and `transition.attrTween`. The examples demonstrate varied D3 techniques for user-driven data exploration, each using sample JSON data embedded in the code.