a goat has two teats ... but they're still called "quarters" like cows!
how about some breed info - what's British (old English, the difference between British & Swiss Togs)
- what's rare (my lovely Bagot!)
better still, get your goaty friends (!) to send you photos rather than getting stock photos off t'internet - its much more "personal" and memorable for the public to see a goat with a name.
other products - ice cream, butter, kafir, Angora stuff: socks etc, meat
could you get hold of some Angora hair, so they could feel it? or even get a selection (shave bits off Reggie!) to compare.
number of goat keepers in Britain / the world
something to dispel the myths that goats are: smelly, noisy, escape, eat everything (oh, hang on a minute.... most of that is, to some degree, true!!)
will post again if I think of more.
I've been thinking of doing something similar (the milking model) and goaty facts talk for school .... So I'll share my ideas so you dont think I've copied your Marigold!