Re: Paper tape anyone?
Talking about paper tape... at FOSDEM this year there was a fascinating talk from the team who are re-implementing EDSAC for schools projects.
Their paper tape reader uses till rolls for shop till printers, which are cheap and readily available.
They implemen tdelay lines using plastic pipes and air, with microphones.
They referred to a paper where Turing works out thta gin is in fact the best medium for delay lines.
Sadly you can't give schoolchildren neat gin to play with!