David Weir says the Paralympics had such a huge impact on changing people's attitudes toward disabilities that "disability is just a word now".
The six-time Paralympic champion told Newsround: "Everyone's willing to come up and ask you questions, about disability or about just normal life. They don't see the chair anymore, they see you as a person."
David won four gold medals in 2012, at a Paralympic Games that had more people watching than ever before.
He said: "I just don't think people realised how good the Paralympics was, until they got tickets for London."
The Paralympics had a big impact on kids, according to a survey commissioned by Newsround - it suggests the Paralympics were "more inspiring" for children than the Olympics.