An unusual pencil grip is only a problem if a child has difficulty writing legibly, at a reasonable speed, or complains of a sore or tired hand when writing.
The free movement of the fingers whilst gripping the pencil is essential for good letter formation. Encourage a child to hold their pencil in a way that allows their hand and fingers to move freely and easily when writing or drawing.
To be able to achieve a dynamic tripod grip to use a pencil efficiently the hand has to have the following skills:
Grotto-pencil grip
Pinch-pencil grip
Cross guard - pencil grip
Soft pencil grip