This reminds me a bit of Hand and Brain [1], another fun variant with kids. We usually switch to normal chess after a predetermined number of moves.

[1] https://en.m.wikipedia.org/wiki/Hand_and_brain

That's so close to a variant we once invented. There were 4 of us, 2 of us good at chess and 2 beginners. We played in teams, a good person and a beginner on each team. We took it in turns to move and you couldn't tell your partner ANYTHING.

As the good player, you had to come up with a good move for the board but also for what your partner might do next. Was fun!