The Court affirms the judgment of the Appellate Division substantially for the reasons expressed in Judge Sabatino’s published opinion. The determination of whether to admit, under N.J.R.E. 701, lay opinion testimony estimating the perceived ranges of children’s ages or heights is best suited for case-by-case assessment. The Court disapproves of State v. Koettgen and its categorical approach to the admission of such lay opinion evidence about age. Henceforth, the trial court, acting as gatekeeper, shall assess whether there exists a proper foundation for the lay opinion being offered, and if so, allow its admission subject to a Rule 403 balancing of the relative probative value and prejudicial effect of the testimony. The Court generally endorses and adds to the Appellate Division’s helpful guidance to trial courts when performing that gatekeeping role and protecting against the admission of unreliable age-related lay opinion testimony.