How about,
'type you name here' and it spits out paper tape with it
punched as text? (I have C code for this). Paper tape is cheap even
today, as you'd only need a foot or two per visitor.
I was going to add that but ran out of tinme, when I...
(And if the tape had their name also coded as
machine-readable, you
could use it as a 'ticket' for other displays or activities...)
... wrote a short piece of PDP-8 assembler to do that on the ASR33 for
my nieces. Several of the visitors who have seen my PDPs have asked
for a bit of tape with something punched on it.
I wrote a version of that for the Sharp PC1500 pocket computer years
ago. It was really simple on that machine -- you printed the text to the
LCD and then read the bitpatten back from the display (there was a BASIC
function to do that). Then just sent the bytes to the RS232 port, which i
connected to a punch.
-tony