Three-year-old Billy Nash knows his times tables already (Image: WalesOnline/Rob Browne)
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Most three-year-olds can count, some may know the alphabet and the words to their favourite song.
But it is a rare occurrence when a three-year-old child knows their times tables, the Greek alphabet and all the planets and what they are made of.
Yet that is exactly what Billy Nash, from Tonyrefail in Wales, can do.
From a young age Billy's mum Michelle Kitchener, 28, could tell he was a little different, and the health visitor admitted to her when Billy turned one that he was showing signs of autism.
"Nothing could occupy him," said Michelle. "He couldn't sit and watch shows like Peppa Pig, he has to watch educational programmes, it is the one thing that he really responds to."
Billy with his mum Michelle
(Image: WalesOnline/Rob Browne)
"He loves to learn, he loves to find out new things. I can't explain the things he knows," she said.
"He learnt the alphabet when he was two and that wasn't enough, once he knew that he learnt how to do it backwards. I can't even do it backwards!
"When he did that he learnt the difference between the vowels and consonants, I have children in secondary school who are learning that. He can read, write and spell."
Due to the complex path to receiving a diagnosis for autism spectrum disorder (ASD), Billy is yet to be formally diagnosed but is expecting to join Tonyrefail Community School in Rhondda Cynon Taf in September.
Billy even knows all the different planet names and what the gases are around them.
We put Billy's knowledge to the test and asked him a series of questions. He listed the dwarf planets: Ceres, Makemake, Pluto, Haumea, and Eris.
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He then listed the eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. He did the alphabet backwards and did his eight times tables.
Michelle said: "My older children go there and I've spoken to the headmistress a few times. She loves Billy, she said to me she doesn't know what they're going to teach him when he starts school.
"He loves to tell people what he knows, he will go up to people and say 'Hi my name is Billy, B I L L Y.
"He is just so amazing, I am so proud of him."