Chelsea youngsters Archie Burden and Luca Rex showed first-team defender Marcos Alonso how the club's Foundation has helped them at a special coaching session at the Cobham training ground.
Archie, 10, who has Sleepapnia and Cleidocranial dysplasia, and nine-year-old Luca, who has 18p Deletion Syndrome and severe hypermobility, are part of the Chelsea Foundation's pan-disability football initiative.
Archie and Luca and more than 20 of their team-mates were joined by Alonso, who took part in training for a BT Sport film that showcases the new Premier League/BT Disability Sport Programme.
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"Putting him in a whole new environment and seeing him flourish has been amazing," said Archie's mum Amanda.
Gallery: Alonso surprises Chelsea Foundation players
Alonso said: "With the millions of fans Chelsea has around the world, it is important to try and get kids involved in competition, even if they have disabilities - they can enjoy playing football as we do and I think it’s great for them."
The Chelsea Foundation runs 11 pan-disability teams from Under-8s upwards for males and females of all abilities and disabilities.
"Luca wasn't a very confident little boy and we came here, he was just like other kids," said Luca's mum Maxine. "You just can't explain what that feeling feels like as a parent to see your child achieve that, when you're told they never will."
As well as coaching the players, the Foundation engages with teachers and coaches to give them the confidence to work with children with disabilities.
The Premier League/BT Disability Sport Programme has helped provide workshops and training opportunitues for foundation coaches, school teachers and university students.
See: Marcos buoyed by pan-disability training experience | Chelsea Foundation Disability Programme