Active Matter was an AA Media Studies workshop that focused on the effects generated at the intersection between digital fabrication techniques and materials with active properties. This particular exploration focused on the material Sodium Acetate (bicarbonate of soda mixed with white vinegar) - a material that can be kept in its liquid state below its freezing point. When introduced to a catalyst, the material instantaneously phase transitions from liquid to solid, producing heat. The explorations investigated the manipulation of form through using wave interference patterns to produce a mould, as well as exploring the different crystallisation patterns that resulted from different dilutions of the solution - made visible through the injection of ink into the crystal structures.