Totally opaque to whether that's "lego's" or "legos" and children in general probably don't care for an overzealous syntactic classification of single morphemes

Totally opaque to whether that's "lego's" or "legos" and children in general probably don't care for an overzealous syntactic classification of single morphemes either. Is "gimme the lego over there" strange? I think it is, and if it is, then it's an interesting dater point to support this hypothesis.