I’m not sure what you mean by “serious” here. Are you saying it’s fake in the sense that it won’t be sold? Or that the license plate would not actually legally allow it to on the road in France or Europe? Or some of the criteria, e.g autonomy, power, etc would make it realistically usable for any use case except literally playing in a playground?
So you’re saying they are legal, truly sold, but the volume? weight? autonomy isn’t enough?
Sorry if you specified a criteria rather than an example that I missed. I’m genuinely curious as to understand because it seem you are dismissing it as useless for anyone rather than, like a buggy, something that one potentially useful but only within some context, to go with your example something one wouldn’t use in a city center but works perfectly on a beach.
PS: full disclosure, I don’t have that car, not have any economical link to the company, only trying to understand the position.