ask for more info (family ages and backgrounds) so we can -
prearrange groups
food was ~£6 per head (£110 total)
short (colour) printed tutorial was important so people can go at different speeds
need to rehearse construction of pi, explorer hat, screens to get the right order!
test all screen cables (one was defective)
touchscreens were fiddly, but good as they can disappear/incorporate into the mess (rather than monolithic black things)
croc clips were very important to avoid soldering
first aid kit needed
explorer hats good but needed periodic resets in some cases
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