Re: teaching computing to kiddies.
Wonder how the license is applied to the Pi
It's strictly non-commercial, by default. There's an entry-level commercialisation option which requires automatic updates to be on (no surprise there*) however if you want any control you'll have to shell out:
If you want control with fewer upgrades, the flexibility to stage and deploy updates when you want, or even the ability to turn off auto-updates then Windows 10 IoT Core Pro is what you need. Contact your Microsoft representative or find a distributor to learn more about licensing Windows 10 IoT Core Pro.
There must be someone who sees that as a positive. Surely.
EDIT: *You also need a Windows Live ID and to accept an agreement (which I haven't read)