ここでは子供達が安心して遊べる。

ここ: here, where, this place, staying here, section
で: in, at, on, with, by, over, through
は: a, the, is, am, are, will
子供: child, children, kids
達: we, our, group, party, plural
が: is, there, but, ga, will, however
安心: relief, peace of mind, reassure, ease, comfort, rest assured, reassuring, reassurance
し: and, shi, four, death
て: the, it, have
遊べる: play, can play