In my experience, which doesn’t always have to be right, they lose interest after 10 minutes and want something ready to play out of the box from smythstoys. And if not, work with him on the X1C and don’t let him be the guinea pig on something that hasn’t been proven for at least a year. 250°C nozzles may not belong in a child’s room unattended… If it costs more than 200 USD for a 10 years old, he will be probably be interesstet on a smart watch or iPhone, Children usually don’t want the same things their fathers want for them and you have to accept that ;-).
IPhone, an interesting link. Windows hated mobile phones for a year - then they didn’t focus on their strengths and iPhone crushed them, which for me ended up with better Android phones.