This project has a well-thought-out purpose, and the mix of land, water, and air modes is not only innovative but very timely given the focus on eco-friendly technology.

Some questions to guide you:

• How many passengers can fit? 

• What kind of technology would it include? the vehicle could have sensors to detect the surrounding terrain and suggest a mode change automatically. For example, if it detects water, it could prompt the user to switch to water mode or make the change itself if fully autonomous. 

• What happens in extreme weather conditions? Adding features like retractable covers or rain/sun shields could make it more versatile, keeping the vehicle safe and usable in various climates.

• Since it’s eco-friendly, maybe it could have regenerative braking for land mode, and perhaps solar panels or wind turbines for extra energy collection when flying or floating. These could help recharge the battery and extend the range.