[davidivadavid]

It seems like that reference always pops up in discussions about education. Is anyone aware of any attempts at tackling the idea in reality?

[mej10]

I don't know whether either of these set out with the idea of creating the Primer, but they seem similar.

Osmo - https://www.playosmo.com/en/ - seems pretty cool. Uses the iPad camera and packets of materials for interactive learning experiences. It could evolve into something like the Primer.

"One Laptop per Child" has/had similar goals while not being nearly as advanced/cohesive as the Primer.