Sorry, replied earlier but forgot to include anyone other than Harold!
"The smaller room (C013, round the corner) will take 10 to 15 easily.
How long do you want in there? We could either make sure both rooms cover the same thing, or stagger timings to suit.
I was thinking of a really high speed thing, someone with a timer - you have to be less than, e.g. 2 minutes! See if maybe we can identify a couple of kids in advance that aren't shy, ask them will they jump up and offer a QUICK tip, then we can hop around between kids & mentors (maybe even a couple of parents) for a few minutes, so everyone can learn something new and easy in a fun, high-energy atmosphere!
A couple of tips might be -
Ctrl-C or Ctrl-X and Ctrl-V
Google search - the difference between entering a phrase to search, and putting the words in quotes.
Opening a new tab in your browser.
Moving up and down a webpage with Spacebar/Shift Spacebar
Name a website that's good for learning tips for Scratch, Java, Raspberry Pi, whatever ..."
Additionally, I've made a very short survey to ask the kids to do this evening so we can see where we need resources - would be grateful if people could have a look and see if I need to add anything else -