One thing I'm considering is getting my kid a laptop when they start asking for a smartphone. They'll be able to engage socially for the most part, but it won't have the "with you every moment of every day" problem. And instead of a device that's mainly geared towards consumption, they'll at least have tool that's designed to to empower its user.
And it will run Linux! No kid of mine will grow up thinking proprietary software is normal! The source is yours to command!