Solar Balloon without electronic kit

The Solar Balloon kit is an all-in-one solution for learning about science, programming, and data analysis.
This experiment can be conducted from elementary school (Cycle 3) to high school and is also multidisciplinary (Technology, Life Sciences, Physics, Mathematics).
The kit contains all the necessary elements and instructions for building a 4-meter diameter solar balloon.
The Solar Balloon uses solar energy to rise and can carry up to one kilogram of payload under optimal weather conditions.
The balloon must be tethered by two 50-meter ropes (included in the kit), allowing the balloon to fly up to 50 meters high. Regulations allow captive flight up to 50 meters without specific authorization.
Once built, the balloon can fly indefinitely; however, it cannot be dismantled and rebuilt. Although fragile, it is straightforward to repair using adhesive tape. When deflated, it fits into a student backpack, making transport and storage hassle-free.
It is ideal to use one kit per class so that students can see all the construction steps and engage in the experience.
Numerous resources are available for free on the website www.vittascience.com, for subject-specific or cross-curricular teaching.
Delivered as an assembly kit, allow 2 to 3 hours for building the Balloon and one hour for its flight.

The kit contains: An instruction guide, a black plastic 30 m x 1 m, two steering handles with 50 m of pre-wound rope, a spindle template, a pair of scissors, two adhesive rolls.