"Different children become ready for school at different times," says Aine Lynch of the National Parents Council.
If you feel that perhaps your child is not quite ready for big school, she says, seek advice from the primary school – and from the staff in your son or daughter's childcare group.
"Talk to your creche, preschool or Montessori school and get a sense from the staff there," she suggests.
"They see your child in a group setting and observe how they manage.
"A child does need to be ready for the primary school experience.
"There is more attention required and bigger groups so the child needs to have a certain preparedness.
"It's a good idea to talk to both the primary school and the childcare setting."
And don't forget to do your bit to help prepare your child – talking to your child and reading aloud all help with their intellectual and social development, say the experts.
Talking positively about the exciting new experiences that 'big school' will provide will also help to prepare a child for the transition.