  In this paper we present new versatile "2D macroscopic Wigner islands" useful
to investigate the various behaviors observed in mesoscopic confined systems.
Our "Wigner islands" consist of electrostatically-interacting charged balls
with millimetric size. We have experimentally determined the ground
configurations for systems of N particles (N=1-30) confined in a parabolic
potential and checked the influence of the confinement and interacting
potentials. The results obtained are compared with the published numerical
results.
