Active (self-propelled) particles hold significant promise in the development of innovative active and smart materials that can move directionally, deform, and adapt to crowded environments. We have recently designed a new kind of microscopic active particle: a droplet propelled by a swimming microalga, which is encapsulated in the droplet. As the enclosed microalga swims, the droplet is propelled. We want to better understand the physics of how the droplet swims, and see how the droplet can be directed in complex environments such as model porous media. The internship is experimental and will involve quantitative image and data analysis.