Are choline and vitamins that help with concentration?

Perhaps. Choline is a precursor to acetylcholine. It is categorized with b vitamins which are essential as co-factors in the conversion of many neurotransmitters which affect concentration. One of the best supplements I have found to help with concentration/add is l-theanine as it blocks the key excitatory neurotransmitter and helps with focus. It has no upper limits of doseage and is safe to use in kids.