For kids 7 to 10 · English + Korean
Electricity,
explained by
a firefly.
Bandee 반디 is a little firefly who walks kids through how electricity, technology, and computers actually work, one glowing lesson at a time. The night map starts dark and lights up as they learn. It's free, there are no ads, and it works with the wifi off.
Learning lights the map.
Every finished lesson lights another lantern in Glow Harbor, the first island. Three more are still dark out on the water: Circuit City, Chip Canyon, and Logic Falls. Those come in updates.
Glow Harbor
open at launch
Circuit City
soon
Chip Canyon
soon
Logic Falls
soon
World 1 · Glow Harbor
Ten little lessons about big invisible stuff.
What energy is. What's actually moving inside a wire. Why a balloon sticks to the wall after you rub it on your hair. Each lesson is a short tap-along scene with Bandee, and it ends with a two question quiz.
There's no timer and no buzzer. A wrong answer gets an "almost! try again," because that's how you'd say it to a kid too.
Every lesson is written in both English and Korean, and kids can flip between them any time.
Mini-games
Finish lessons, unlock games.
Each game runs on whatever the lessons just taught, so playing is secretly reviewing. Kids figure that part out eventually. By then it's too late, they know how circuits work.
Static Lab
A rub-to-charge sandbox. Build up static and let the sparks jump.
Spark Runner
You're the electron. Keep the current moving and dodge what's in the way.
Conductor Sort
Metal key or wooden spoon? Sort them into the right bin, fast.
Light the Town
Rotate the wires until the circuit closes and every window glows.
Bandee's Den
Sparks buy silly hats.
Lessons and games earn sparks. Kids spend them in the Den on new glow colors, hats, and light trails. It's their firefly, after all.
Sprout + lime
Crown + rose
Wizard + ice
For the grown-ups
The boring details. They're the good part.
I wanted an app I'd be comfortable handing to a seven year old and walking away from. So that's the whole design: nothing to buy, nothing to sign into, nothing watching.
There's a Parent Corner with per-kid progress, tucked behind a multiplication question. It works on kids and, honestly, on some adults.
Fully bilingual. Every lesson, game, and button in English and Korean. Switch anytime, per kid.
Up to four kids on one phone, each with their own map, sparks, and firefly.
Free. No ads, no in-app purchases, no "premium worlds." The whole app is the app.
No accounts, no data collection. Profiles and progress live on the device and nowhere else.
Works offline. Airplane mode, road trips, the basement at grandma's. All fine.
Gentle by design. Big touch targets, no reading-speed pressure, and mistakes get an "almost!" instead of a buzzer.
Almost there
It's not out quite yet.
Bandee is in testing right now and headed for the App Store and Google Play. Leave your email and I'll send one note the day it's out. That's the only thing I'll use it for.
Bandee is made by one person, me, under noonchi labs. Questions, or want to help test with your kids? I read every email myself.