Clusterz is designed to look like the nucleus of an atom, the hard plastic "proton" and "neutron" beads that move around a center axis.
But don't let our sciency description dissuade you. We fell in love with this stress relief fidget toy because it's small and transforms in your palm as you give it a squeeze. The bead clusters are connected with elastic so they always return to their original configuration. Clusterz also fits comfortably in a pocket for discreet fidgeting.