For coding we could either point them straight to the source athttps://scratch.mit.edu/
and/or put them into this getting started thingy https://scratch.mit.
(If you create some sounds or other stuff in Scratch, you can hook it up to the Makey Makey to activate your code BTW. That's what Lucie did with Bethel.)
Please let me know what is there in terms of conductive stuff, including fruit or gourds or plants, and I'll try to bring some too.
P.S. - We could also, now or eventually, use some Scratch cards or Scratch challenges to get students going.