  The role of quark correlations in the description of hadron dynamics in many
domains of physics, from low energy dynamics to very hot(dense) systems, is
being appreciated. Strong correlations of two quarks (diquark) have been widely
investigated in this respect. Recently, we have proposed a dynamical scheme to
describe the $\Theta^+$ pentaquark in which also three quark correlations
(triquark) were instrumental in producing a low mass exotic state. We perform a
study, within the QCD sum rule approach including OPE and direct instanton
contributions, of triquark correlations and obtain two quasi-bound light
$ud\bar{s}$ color quark clusters of 800 MeV and 930 MeV respectively.
