- ask for more info (family ages and backgrounds) - prearrange groups to some extent - food was £6 per head - (colour) printed tutorial was good - 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 disappeared into the mess (rather than monolithic black things) - croc clips were important to avoid soldering - first aid kit needed