Establishing hand dominance
Clear hand dominance can take up to the age of 6 to develop and some people can go on to be ambidextrous. However, if a child has reached this age and is showing difficulties with grip and letter formation and they haven’t yet established hand dominance then they should be encouraged to do so.
Many children are slow developing hand dominance due to difficulties with crossing midline – see Being able to reach across my body advice sheet.