Understanding the aggregation of magnetic particles is also essential for their use in the fabrication of metamaterials, [8] as magnetic separation agents in, e.g., protein purification protocols, [9] as contrast agents in magnetic resonance imaging, [10] or as cell manipulation operators [11] among others.Floating magnetic particles have also been extensively used in the bottom-up fabrication of different dynamic selfassemblies, which develop order at the same time as dissipate energy. The strong confinement of a system of particles can dramatically influence both the nature of their interactions and the long-range order possible, permitting the existence of new structures and phases both in equilibrium [12,13] and out of equilibrium. [12,14] Besides, the quasi 2D nature of these systems facilitates the experimental analysis of the structure and dynamics. In this regard, magnetic colloids adsorbed at liquid-liquid interphases have been proven to be suitable model systems to investigate the formation of static and dynamic arrangements of particles, and promising candidates to engineer novel functional planar structures unfeasible in bulk dipolar systems. [15,16,17] Grzybowski et al. studied disparate dynamic structures formed by rotating millimeter-sized magnetic disks, in processes ruled by the equilibrium between

The application of static or precessing magnetic fields on superparamagnetic colloids confined at fluid interfaces induces the formation of different self‐assembled structures, mainly determined by the field tilt angle. In article number 2101188, Fernando Martínez‐Pedrero, Carles Calero, and co‐workers demonstrate that dynamic bead‐like structures composed of spinning particles can be used in the transport of adsorbed matter at microscale via hydrodynamic interactions.