Hi there, sorry for getting back to you so late. If cost is a factor (and I assume it is, since its an educational application for children) then I'd say you should go with the Rock64. Its a solid board and it is well supported all around. It is also low-power and capable.
In my view, if you decide to use the Rock64 then the best OS to pair it with is Armbian, which has both a Debian and Ubuntu variant.
Let me know what you think
In my view, if you decide to use the Rock64 then the best OS to pair it with is Armbian, which has both a Debian and Ubuntu variant.
Let me know what you think