What is the record for the most devices played with different games on each?

As in setting them up on a bench and playing each device in turn without losing any live/momentum in each game ie; an ipad, gameboy and iphone (plus added devices).

Very similar to world chess players playing several people at once.

My young brother in law can do 3, we're aiming for 7!

I can't find a record for that, but I've seen people do shiny hunting on Pokemon games by setting up 10 gameboys at a time and playing all of them at the same time.