While you may not recognize John McGinley's name right off the bat, you're sure to know his face. With more than 50 impressive movies to his credit including Platoon, Wall Street, Born on the Fourth of July, Seven, Any Given Sunday and more, he's quite an accomplished actor. But his latest and most favorite project to date is his role as the quirky Dr. Perry Cox on NBC's Emmy-award winning comedy Scrubs.

"Scrubs is the best gig I've ever had," says McGinley of the show, which was the No.1, first-season comedy its debut year. "As an actor, it's great to play a strong leader with a heart of gold. Dr. Cox is a reluctant mentor to the rookie doctors he trains, but he takes his leadership role seriously and relies on the tough-love school of teaching."

In real life, it's the leadership role of Dad to son, Max, born with Down syndrome, that McGinley takes most seriously. "I'm just completely in love with Max," he says. "He just completely redefines my universe. He's just a stunningly beautiful little boy."

Bringing Up Max
When Max was born, McGinley says he immediately hit the books to learn everything he could about Down syndrome, and his expertise today is remarkable. He's an active advocate for Max, working to give him opportunities to help him develop and acquire the mental and physical skills that he needs. "The learning curve is through the roof on picking up on all this kind of stuff," says McGinley.

Max does a variety of therapeutic activities every week including horse back riding, gymnastics, trampoline work and much more. McGinley says that trampoline therapy, for example, helps develop Max's connective tissues and adjusts him to "banging movements" with which Down syndrome children often have difficulty. "It's phenomenal," he says. "He loves to jump. Plus, it's tons of fun."

And it seems to be working. "We've had this huge, huge growth spurt," says McGinley. "Knock on wood here, Max is going to be a pretty high-functioning kid. He's rapidly becoming – by virtue of this wonderful, developmental spurt – a precocious, no-good, confounded, Irish troublemaker."

Max did have a minor setback when he was 2 years old after doctors diagnosed him with a seizure disorder. McGinley and Max's mom, Lauren Lambert, had to inject him with medicine to keep him from having seizures. Eventually, however, it abated, and he no longer has any problems. "Everything else, God willing, seems to be falling into place," says McGinley.

Down Time
And who better to mimic than Dad? McGinley, who has Max on the weekends, says they do all kinds of fun stuff together, some of which also helps Max developmentally. "I am a moving, 100-pound Irish jungle gym," says McGinley. "I'm what you want to climb on."

The pair spends lots of time in the garage, which McGinley has lined with mirrors since it's easier for Max to see himself do activities. "We do this thing where we dance," he says. "I put him on my shoulders, I put on Van Morrison, and we just dance." While it's not only fun, being on his dad's shoulders also helps Max engage certain muscles.

Father and son also sing together, play musical instruments, run the dogs, go to the beach and much more. "I sing to Max constantly, because he sings along with me," says McGinley. "It becomes this parade of good, clean fun and lots of it."

But one of his favorite activities is reading Max a story every night. Even on nights when Max is at his mom's, McGinley still tries to read him a story over the phone when he can.

Raising Awareness
While McGinley spends most of his time as Dad and Dr. Cox, he's also made time to be the spokesperson for the National Down Syndrome Society's annual Buddy Walks after participating in the one of the walks with Max in 2001.

More than 150 walks, which raise funds for and awareness of Down syndrome, take place in cities across the U.S. each October in honor of National Down Syndrome Awareness Month. "Buddy Walk is not just for people with special needs," he says. "It's wide open. Everybody's welcome. It really is breathtaking."

And he points out it's not a long hike or run since it's only 1 mile, so it's easy for anyone to participate. For more information on the Buddy Walk or to find a walk near you, log on to www.buddywalk.org.

From One Parent to Another
When parents learn they have a child with Down syndrome, it's often easy to start to feel sorry for themselves. McGinley's best advice to parents of children with Down syndrome, especially new parents, is avoid that trap. "It feels like an impediment or roadblock for the kids," he says. "But, you know, Max – he's both guns blazing. He's ready to go. He never ever feels sorry for himself.

"These kids are extraordinary," says McGinley. "Put a penny of love in, and get about a million dollars back in return."