Pencil grasp development for handwriting starts before you think it does! Even babies and toddlers are developing proper pencil and hand grasp.
Stages of a developing pencil grip Learning To Write – My Little Learner
Developmental Progression of Pencil Grasp
Should I Be Concerned About My Child's Fine Motor Skills?
Identifying Pencil Grasp Style: Why It Matters - MedBridge Blog
Tripod Grasp: A Fine Motor Skill With A Big Impact - OT Perspective
Development Appropriate Pencil Grip & Drawing Skills
Grasp Patterns and Fine Motor Development
Happy Kids Clinic
Typical Pencil Grasp Development for Kids
Pencil Grip Development