According to royal author Phil Dampier who chatted with The Sun, Kate and William know Prince George has a special place in their family due to being the literal heir to the thron

Princess Kate is returning to her royal role on her own terms, according to a royal commentator. The Princess of Wales travelled by mini bus to visit the National Portrait Gallery on Tuesday to launch an innovative project supporting young children's social and emotional development.

"It was as if she was one of the mums" when the Princess of Wales joined schoolchildren on a field trip to the National Portrait Gallery

Princess Kate Middleton held hands with school children and rode on a school bus during a visit to London’s National Portrait Gallery

Kate Middleton made an official visit to the National Portrait Gallery today and arrived in a different kind of style. Instead of the usual convoy of royal vehicles, the Princess instead emerged from a bus alongside school children as they excitedly made their way to view a new project in the gallery.

The Princess of Wales introduced a new phase in her early years campaign at the National Portrait Gallery in London