Hello Ma'am as per your words...
If your son is showing mild symptoms Of ADHD... He needs proper graded exercise and vigorous games and explore the outer world to reduce his sensory urges.
Next Steps
ADHD itself has two diagnosis.. Weather it is attention deficit or Hyperactive due to which he is not able to concentrate....!! Pls get his proper evaluation and assessment done.
It can be just Sensory disorder as well.
Health Tips
Let the child swing, slide, pull and push activities, climbing up and down under super vision.. Let him feel different texture and satisfy his senses with diff texture, food, lights, sound etc
Thank you and good luck.. 👍