Ryan Smith suffered a serious brain injury when he was knocked off his bicycle last year.
His family, who are from Skegness, say he wasn't wearing a helmet because he didn't want to mess up his hair.
After four months in a coma, Ryan is now at The Children's Trust in Tadworth, Surrey, has taken his first steps and has started communicating again.
His sister Rachael, 21, has postponed her training as a nail technician to care for him.
She tells Newsbeat reporter Rick Kelsey what life is like for the family since the accident.
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