This example builds an interactive bubble chart from cereal nutritional data, letting viewers toggle between different measurements like calories, protein, fat, and sugar. Each cereal is represented as a circle whose size encodes the selected value, and the SVG bubbles gently animate when the category changes. The visualization is implemented with D3 v4, uses a force simulation to position the bubbles, and is styled with a single blue color at partial opacity, with a light blue outline for each circle. The dataset is loaded from a CSV file and bound to the circles using D3's data join. The chart offers a simple, playful way to explore multivariate nutrition data through direct manipulation.