If used carefully you may very well find that essential oils enhance focus in children with ADHD and attention issues. Essential oils are not a cure, but it seems they can be used to calm your child and may help to improve concentration.
How to make your very own DIY Clay Necklace Diffuser for essential oils! Love this idea. It's super easy to make and the scent last so long around your neck. Could be cool as a bracelet too :) This Brand is my fav: https://miracleessentialoils.com/guide408/?&c1=PIN&c2=C14-A4