Someone Actually Made a Fully Playable Banjo From a Party Balloon

I’ll be honest: the first time I saw images of Co:Creation Lab’s Balloon Banjo, I laughed. Not in a dismissive way, but in the way you laugh when something is just genuinely delightful. It’s lime green and baby blue, shaped like a proper banjo, and where a wooden drum body should be, there’s a round, inflated party balloon clamped neatly into place. It looks like something that fell out of a toy box, which is exactly the point, and also exactly why it’s brilliant.

The concept is almost absurdly simple. You download 19 3D-printable parts, assemble them into seven components, and thread nylon fishing line as the strings. The balloon slots in underneath the frame and does what balloons do: it holds air. But that air is doing real acoustic work. The taut rubber surface acts as the sounding board, vibrating when you pluck the strings and creating an actual, if quirky, musical tone. Want to change how it resonates? Just add more air or let some out. No tools, no glue, no specialist equipment. The physics are right there in your hands, adjustable in real time.

Designer: Co:Creation Lab

One of the more considered decisions in this design is how it handles assembly. There are no metal screws. Instead, the parts use 3D-printed plastic screws, sized so that a six-year-old can turn them with their fingers without stripping the threads. That small detail says a lot about Co:Creation Lab’s thinking. This wasn’t designed to impress engineers. It was designed with a specific constraint in mind: a parent should be able to build it together with their child. The build is the experience, not just the end result.

I find that kind of intentional constraint genuinely refreshing. Design often gets celebrated for how much it can do, how many features it can pack in, how complex it can become. The Balloon Banjo goes the other direction entirely. Every choice is stripped back to what’s necessary, and what’s necessary turns out to be enough. The design files are available to download, and the materials cost next to nothing beyond the printer and filament. A party balloon, some fishing line, and a little patience. That’s it.

Is it a real musical instrument? Technically, yes. Is it going to replace your ukulele or compete with an actual banjo? Absolutely not. It’s more of a homebrew science toy than a concert-ready instrument. But I don’t think that’s a limitation so much as a reframing. The Balloon Banjo doesn’t ask to be taken seriously as an instrument. It asks you to be curious. It asks you to understand why it makes sound, what changes when you add more air, and what happens if you pull the string tighter. Those are good questions for any age.

The aesthetic is also doing a lot here. That lime green frame and the pastel blue balloon aren’t accidental. The color palette is cheerful and toy-like, which signals immediately that this is meant to be played with, not displayed behind glass. Compared to the earnest seriousness that tends to follow a lot of maker culture projects, the Balloon Banjo has a lightness to it, a sense of humor about itself, that makes it more accessible rather than less.

The broader conversation around 3D printing still tends to lean utilitarian: replacement parts, custom brackets, functional objects. What Co:Creation Lab has made is a reminder that fabrication can also just be fun. That you can hand a kid a finished thing, and the fact that they helped build it is what makes it matter. Good design doesn’t always have to solve a problem. Sometimes it just has to make you want to pick it up and pluck a string. Even if the sound is a little wonky.

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Garmin’s Tacx Neo 2T Turns Your Existing Bike Into a Connected Gym, No Extra Setup

You know that bike sitting in your garage, judged by cobwebs, wondering when you’ll finally take it out again. Garmin just gave it a second career. The Tacx Neo 2T with Zwift Cog and Click, out August 21 for $1,099, clips onto pretty much any bike with 8 to 13 gears and turns it into a full smart trainer, complete with power tracking, cadence data, and a straight line into Zwift and Rouvy. No cassette swap, no calibration ritual, no YouTube tutorial at 11pm trying to figure out why your bike won’t pair.

Basically, Garmin looked at the whole “buy a $2,000 smart bike” trend and said, why not just use the one you already own. You bolt the trainer on, plug in the included remote for virtual shifting, and you’re pedaling through a Zwift climb before your coffee gets cold. It is less a new machine and more a software upgrade for your legs.

Designer: Garmin

The actual hardware here is not new, and Garmin is not pretending otherwise. The NEO 2T shell, that angular black and blue wedge with the vent slots, has been around since 2019. What changed is what sits inside the flywheel. A bright orange Zwift Cog now stands in for your entire cassette, and it is compatible with almost any 8 to 13 speed bike, no tools required beyond whatever it takes to bolt your bike onto the trainer itself. Pair it with the Zwift Click, a small handlebar remote that handles shifting, steering, and menu navigation, and the whole “getting started” phase collapses into about ten minutes.

What you actually get for your money is the boring but important stuff. Power and cadence accuracy within 1 percent, dynamic resistance that adjusts for weight, speed, and incline, and enough quietness that you will not wake up the rest of the house doing intervals at 6am. Buyers who are new to Zwift also get a free membership offer, though Garmin has not said how long that lasts.

For years, the trend was building bikes that look like sculptures, cabinets that hide a Peloton, frames designed to disappear into a living room. Garmin is taking the opposite route. Instead of hiding the machine, it is shrinking the amount of machine you need in the first place. Your actual bike stays your actual bike. The only thing that changes is what happens once you clip it in.

You do not need a second bike, a dedicated smart frame, or a spare room that quietly becomes “the cycling room.” You need the bike you already own and about ten minutes on a Wednesday afternoon.

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This Foam-Free Eco Packaging Is Made From Compressed Rosemary Waste, And It Carries The Aroma Too

Expanded foam or polystyrene has had a good run as the default packaging filler, mostly because it’s cheap, light, and nobody was really committed to sustainability for the last half century so the industry is pretty set in its ways now. Expanded foam does not decompose, it does not do anything useful once you rip it out of the box, and it has spent decades sitting quietly in landfills being extremely unbothered by the concept of consequences. Designers have been chipping away at its throne for years, swapping in mushroom mycelium, seaweed film, pressed pulp, whatever grows fast and decomposes faster. Scentra joins that lineup with a twist nobody else has really tried. Rosemary.

Instead of growing a material or pulping something into a smooth foam substitute, this one compresses actual rosemary waste, stems and all, into a block held together with a seaweed binder. The result looks rustic rather than manufactured, and it carries the plant’s natural scent right there in the fibers. Crack the box open and rosemary hits you before the product does. Foam never managed that trick, and honestly, it never tried.

Designers: Zhixi Dai, Zhou Yun, Wang Zhan

The rosemary itself comes from an organic farm in Guizhou, China, run under Omni Biotech’s AOLUX line, where trimmings that would normally get swept up and discarded are collected instead. The farm also employs local workers from low income families as part of a rural revitalization push, so the sourcing story has a human angle sitting quietly underneath the material one. Designer Zhixi Dai led the project with Zhou Yun and Wang Zhan rounding out the team, and between them they turned a farming byproduct into something structural enough to actually protect glass.

The block is cut with a cavity shaped exactly like the essential oil bottle it holds, silhouette and all, so the packaging reads almost like a little doorway with the product framed inside it. Pull the bottle out and you are left holding a chunk of compressed herb that still smells like the plant it came from. Set it on a shelf, add a few more drops of oil when the scent fades, and it keeps working as a passive diffuser. No batteries, no wiring, no porcelain filter to keep clean. Just plant matter doing what plant matter does.

We have seen versions of this waste to material pipeline before. Beer mash has been pressed into leather, spent grain has been molded into stools, rice husk has been packed into furniture. What usually happens in those stories is the waste becomes inert once it is shaped, useful for its structure and nothing else. Scentra skips that step. The rosemary does not stop being rosemary just because it got compressed into a block. It keeps its oils, its texture, its smell, all the things that made it worth growing in the first place.

That is really the whole pitch here, and it is a good one. Most eco packaging asks you to feel good about something you cannot see or verify, a recycling percentage or a compostability claim buried in fine print. This one just smells like rosemary. You do not need a certificate for that, though it has one anyway, having picked up the Best Eco Design win at the European Product Design Awards.

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