Hamish Blake has revealed the way he has been documenting his and Zoë Foster Blake's adorable toddler's growth.
On Friday afternoon’s Hamish and Andy Show, the 35 year old said he has started capturing how Sonny’s handwriting and signature evolves as he learns how to write.
"I got very into the sentimental milestone seed planting for Sonny who is now three," the father-of-one revealed.
"I get a bit excited thinking about what we can do now that long term will pay off and will be super sentimental," he said.
"About three or four months ago it occurred to us he could see his name and he could pick up a crayon and make a pretty close approximation. Certainly [he could form parts] of the S, he can do the O, can’t do the Ns and is terrible at the Y. But he is getting closer and closer."
"So it occurred to me one day he will be able to write his own name even though he can’t now, and I thought, ‘how do I capture the progression?'"
"So I went and bought a deck of 500 index cards, got Sharpie, and every week we sit down…and whatever little scribble he makes we will file away. Over time, I can film them and put them together and hopefully the squiggles show the evolution of his handwriting."
"I love the idea, I’ve lost a bit of gas for the idea but I will try to keep it up," he said.
Australia's favourite couple are currently preparing for baby number two, with Zoë saying her experience has been far better the second time around and sharing her pregnancy tips online.