Vitamin question - rainbow light

So my son is 4 and his pediatrician recommended he start a multivitamin and she said her favorite is the rainbow light kids. I ordered it come to find out I was doing research and their prenatal one contained lead and trace amounts of heavy metals. So now I’m terrified to give these vitamins to my son even though I know the kids ones weren’t the ones that were found to have it but it’s still the same company. Anyone recommend that brand or have different brands they think are better? He was taking Smarty pants toddlers but my pediatrician insists that they are not good vitamins since they are gummies