Take a look this summer inside some of America's garages, museums and libraries and you'll see that the "maker movement" is thriving.
This hands-on, DIY culture of inventors, tinkerers and hackers is inspiring adults and children alike to design and build everything from sailboats and apps to solar cars.
And this fall, more of these chaotic workspaces, stocked with glue guns, drills and hammers, will be popping up in schools, too.
But the maker movement faces some big hurdles as it pushes into classrooms.
Here's the first big one:
Schools "are not thinking about it as an instructional tool," says Chris O'Brien, a former teacher who helps schools create maker and project-based learning spaces in New York City.
He says schools make a big mistake if these programs are merely a popular elective with the hip teacher, or the place to go after school to play with wood, cloth or a 3-D printer.
Schools that embrace making, he says, need to find a thoughtful place for maker projects in the school's curriculum. Otherwise, he warns, maker spaces could "go by the wayside and become an after-school program."
One school that's trying to get it right is the Lighthouse Community Charter School in Oakland, Calif., located in an otherwise bland industrial area out near the airport.
In Lighthouse's maker space, called the creativity lab, one student has just accidentally glue-gunned a large piece of wood to a table. Oops.
Another student is working on a drone prototype made of Styrofoam. There's also a disco ball made with LED lights and paper cups.
Seventh-grader Blanca Hernandez is working on a cardboard doll house with lights and furniture.
"You can make whatever you want, and no boundaries — only, like, not setting things on fire," she explains. "No boundaries on your creativity."
Well, the other boundary is that Lighthouse has worked hard to try to link its maker space with what teachers are doing in the classroom.
Tanya Kryukova teaches physics here.
Her hands-on projects, with help from the maker lab, include a mini electric house project to explore circuits, and cars made from mousetraps and rubber bands. She says she's always asking: How can we apply physics concepts to make these projects work better?
"I think for me, the true learning comes in when a learner is curious and asks questions," Kryukova says. "They're trying to find out and they say, 'Oh, so it's like this. This is how it goes.' "
But there is a tension.
That gets us to the second challenge: As maker space expands into more schools, there are fears it will be corporatized — and watered-down with demands for tests, Common Core alignment, accountability and structure.
That's disturbing to a movement that's been marked by largely unstructured creativity and exploration.
There's that nagging question: Will a pedagogic approach to "making" suck the joy and soul out of it?
Thirteen-year-old Khalil Roberson's take: Remember to keep it a little weird, free-form and fun. "This is just a spring coil," he tells me. "So I'm going to solder right now. I just love making, exploring different things."
I ask him: What's the coolest thing you've made in here so far?
"I'd have to say the hovercraft. Of Styrofoam, rubber bands and glue gun."
Another solution to that challenge, at least for Lighthouse, is to make tinkering, at times, a more deliberate, human-centered activity.
For example, one assignment requires students to design and build something for a friend or the wider community to use.
Lighthouse's creativity lab director, Aaron Vanderwerff, says this requires students to interview the prospective user of the project "and think about what they are interested in." Then, they "prototype different possible solutions to a problem. Then you can get feedback from your user before you create your final product or process."
While they're using the lingo of tech (Focus on the user! Human-centered design!), these students aren't wealthy kids from Silicon Valley.
Lighthouse's population is nearly 90 percent African-American and Latino and 85 percent lower-income.
"Every kid at this school knows what making is and knows what maker fairs are," says Lighthouse's creativity lab teacher, Amy Dobras. "I think this school does a really good job of really 'browning' the maker movement in a lot of ways."
And that gets to the third big challenge for maker education: making it not just the purview mostly of middle- and upper-middle-class white kids and white teachers whose schools can afford laser cutters, drones or 3-D printers.