This supports the controversial neuroscience theory that the brain contains " grandmother cells " that learn to recognise particular categories of people or even individuals , such as a grandparent .
Kati marton , holbrooke 's widow and a noted author , says that although holbrooke adored his children , he came to appreciate the full importance of family only in his 50s , at which point he became a very present parent and grandparent , while continuing to pursue an extraordinary public career .
For example , a parent or grandparent reading a story aloud , whether from a traditional printed book or from an ebook , can be a great opportunity for adult and child to share some quiet , relaxed quality time together away from the rush and stresses of the business of daily living .