NEW YORK — At six months old, 5-year-old Ian was diagnosed with infantile spasms, a form of epilepsy.

Ian’s mom Katherine Joyce said her son has been seizure-free for two years.

“It hasn't been easy because Ian is my first child this has been just everything at once, has been a new experience. It's been getting to know this child, being with this child and then having your child end up with special needs and a condition," said Joyce. “Now he's doing things he wasn't doing before and I remember the other day I was like 'I can't wait until my son finally hugs me' and now he hugs me super tight, and he's doing a lot of things he wasn't doing before and I was like 'I can't wait until he starts moving' and now he's even moving more.”

And now he's really moving, fast!

Ian joined other children Saturday at The Charles Lazarus Children’s Abilities Center at Mount Sinai for “Go Baby Go.”

Researchers, doctors and physical therapists at Mount Sinai teamed up to build customized toy cars for children with cerebral palsy or other mobility disorders. Cerebral palsy affects mobility and muscles.

The cars are specially designed to fit the needs of each child. Dr. David Putrino said the goal is to give the kids an outlet and a new level of independence that doesn’t feel like rehab but feels like play.

“It's all about encouraging mobility, encouraging play and encouraging participation. It's about passively through fun, getting kids out there, getting them moving just enabling them to do things that they didn't think was possible for them," said Putrino.

And they were ready to push the pedal to the metal, like 4-year-old William.

“I think it just shows that there's always something that can help you achieve what you want to achieve and there's people out there that are willing to put in the time to help you to get there" said William's mom, Nicole Hawley.

And while the children drove away happily in their new sweet ride and even a license, it was their parents that had the biggest smiles.

“I did not expect him to be going that fast or just gravitate to this so quickly but i'm so excited i can't stop laughing I can't stop smiling," said Joyce.