  The origin of the chemical anomalies in star clusters is still an open
question, although much effort has been employed both from a theoretical and
observational point of view. The exploration of whether such multiple stellar
populations are found based on certain properties of clusters has represented a
compelling line of investigation so far. Here I report an overview of the
results obtained from our latest surveys aimed at characterising the phenomenon
of chemical variations in star clusters that are much younger with respect to
the ancient globular clusters. The fundamental question we are asking is
whether these abundance patterns are only restricted to the old massive
clusters; and if not, is there a difference between young and old objects?
