Ava and Sophie have plenty of energy, and plenty in common.
Their paths first crossed when they were diagnosed with serious liver conditions as babies.
Both received life-saving transplants, and are now taking part in British Transplant Games in Newport.
Ava was born with biliary atresia, a life-threatening condition of the liver.
She had her first liver transplant when she was only months old, and needed a second one soon after.
Ava's mother described her joy at seeing her daughter thrive each day, having overcome such serious health problems.
The families have become firm friends, and both Ava and Sophie are going to the same high school this September.
For Ava's mother, the Transplant Games are also an opportunity to say thank you to the families of organ donors.