Ok so Sandra Bullock has a new movie about blindfolds.
I have not seen the full movie but parents should decide if children should watch it..But as far as I can tell no one is bound and gagged so it might be safe to see from that angle. It is important not to try to do the bird box challenge without sighted people watching. Here are two good examples
see this whole channel. You can tell that this lady blindfolded them so they could not see anything.
In this next video, a mother blindfolds her kids at a toy store https://www.youtube.com/watch?v=kvraZ9hAksY&t=227s