You are aware that there is an ageplay event called "pre-school" in the UK? It's not like the thing announced above; nevertheless, I think it might be interesting.
http://www.spacetobeme.co.uk/#!preschool/c269

Not that I would have the time or money to attend. Even though I've been considering it for a while. If anyone is going, you might want to drop me a note, though. I might join in.