Joshua is 28.
His oak is now more than six metres tall and still growing.
Every year, the family gathers beneath it to celebrate his birthday. As candles are blown out and new photographs are taken, the tree marks another year of family life.
Joshua's own children race towards the swing hanging from one of the tree's strongest limbs. They climb its branches, play beneath its canopy and know it simply as Daddy's tree.
They give little thought to the years ahead. They are too busy enjoying the moment.
But one day, they may return with children of their own.
They may tell them how the tree was planted on the exact day their father was born.
They may show them its place in the Arbora Registry and the first photographs taken when it was still only a sapling.
Another generation may one day gather beneath the same branches, adding their own celebrations to the family tradition.
Some gifts are opened once.
Others become part of a family's story forever.