It's an expensive hobby for sure, but it's one growing in popularity.

Learning how to fly is an incredible challenge requiring a lot of hours and technical skills.

These days, who's doing the teaching might surprise you.

Age is just a number when it comes to flight school.  It's the fact that those numbers are low that might get your attention.

And I've had people come up and say that, where they come up and say, 'are you sure you have your hours correct'," 24-year-old flight instructor Kendall Young said.

"I was just like, does he know what he's doing," 21-year-old Andres Morales, a flight student, said.

Not all teachers are this young, but Kendall Young says it's common for aspiring pilots his age to get a teaching certification and then use those hours to fly onto bigger career goals.

Sometimes the students are younger, like Morales, sometimes they're as old as 72.

So, what's the main difference between the younger and older students?

"A lot of the younger guys, it's the iPad generation, they understand how advanced avionics work in an aircraft. The older guys, they're like "why is all this digital?" Young said.

"I feel like I'm talking to my instructor and a friend at the same time. He makes me feel comfortable," Morales said of learning from someone his age.

Morales aspires to be a commercial pilot.

Young is using this experience to one day be able to fly humanitarian missions in Africa.

He says teaching other people, no matter the age reminds him that his passion lies in the skies.

"It's cool now seeing it in students eyes when they first take off because they're like 'oh my gosh, I actually did this,'" Young said.

Proof that no matter how old you are, there's nothing wrong with feeling like a kid.