Pencil grasp is one of the first things an OT will assess when a student has difficulty with legible handwriting. This is because there are many different ways a kiddo can hold a pencil; some are effective and functional while others are not and may even cause handwriting to be painful. If your kiddo needs a little help with learning a correct grasp then use some of these resources.
Practical Ways to Improve my Child's Pencil Grasp
5 Fine Motor Activities to Help Pencil Grasp
To Grip or not to Grip? Advice on choosing a pencil grip for your child.
Development of pencil grasp, functional and non-functional grasps.