Two young inventors on their way to the Concours Lépine 2027.
16°15′ N · 61°35′ W 48°51′ N · 2°21′ E
Explore the missionThe inventors
Arthur is all about space.Théo is all about stories.COSMOS was born somewhere in between.
Twins · Age 10 · Guadeloupe
Co-inventors of COSMOS
We wanted to learn science differently: not just by reading or listening to a lesson, but by living an adventure where you have to understand what's going on to keep going.
So we started imagining missions, characters, problems to solve… and then a real glowing companion to live them with us.
We didn't always know how to do it. So we learned, tested, failed, tried again… and COSMOS grew up with us.
The invention
A science adventure where you're the hero.
An interactive space co-pilot to learn by living a mission!
We imagined COSMOS for ourselves, for fun: we didn't want to discover space through a lesson, but to really go on a mission.
We talk with the crew, explore, face the unexpected, ask questions, make choices… and the story reacts to our decisions.
With COSMOS, knowledge doesn't come before the adventure. It becomes what you need to keep going.
A COSMOS mission is something you live.
ISS, Moon, Mars, Europa, Titan… Every mission brings a new place, new characters and new problems to solve.
We really talk with the mission's characters. We ask them our own questions, we can even go off the planned path… and the adventure still goes on.
COSMOS doesn't just tell us a story. We make decisions, test ideas, sometimes get it wrong… and have to find another way to keep going.
The device lives the adventure with us: its light reacts to what happens in the mission. The story doesn't stay on the screen, it's right here beside us.
Designed mainly for ages 8–13.
Mission Lépine
If we are selected for the Concours Lépine 2027, we will present COSMOS in Paris for 12 days.
Join the crew
COSMOS is ready to travel. To see it through, we're putting our crew together. Here's the support the mission needs.
We live in Guadeloupe. Taking part in the Concours Lépine means travelling between Guadeloupe and Paris, for us and our parents. We're looking for an airline partner for this trip.
Become our airline partnerThe fair lasts 12 days and we'll only be 11. To fully enjoy this adventure without being on the stand from morning to night, we're looking for 2 to 3 people to join our crew, present COSMOS to visitors and take over when we need a break.
Beyond the hardware, we're looking for a partner to build a solid setup, designed for non-stop demos throughout the fair.
The idea isn't to rebuild COSMOS. It's to make the demos as solid as possible before the fair, with input from experienced people.
COSMOS uses space exploration to get children thinking. We'd love an outside eye to keep the content accurate, accessible and age-appropriate.
Twelve days at a fair take careful preparation, beforehand and on site. Reliable hands-on support lets the crew focus on what matters: showing people COSMOS.
Open a channel
Company, institution, non-profit or school: tell us how you'd like to come aboard. We'll get back to you personally.
Every collaboration can come with visibility we agree on together: your logo on our stand at the Concours Lépine — nearly 400,000 visitors —, on the COSMOS website and, if you wish, on the social media accounts dedicated to Arthur & Théo's adventure.
Of all the people we'd love to meet on COSMOS's journey, there are two who are a little bit special:
Sophie Adenot and Thomas Pesquet.
So Sophie, Thomas…
They say dreams never die. So we thought ours might just find its way to you…
Arthur & Théo ✦
Status: waiting for a signal…
