I also had a slightly befuddling railway request at the weekend. My sister rang and said "Oli wants to ask you something?", and put him on the phone. (He's three and a half).
"Auntie Sue, have you got any bridges?"
I couldn't quite make the last word out, and asked him to repeat, and then had to ask him to put Mummy back on, and ask her. When she explained that he'd said bridges, I was still a bit bemused, until she said that he's been having trouble with the lowish bridges that come with the cheap Ikea Brio knock off track sets, and some of his bigger locos not going under them. So what he was asking was actually "Auntie Sue, will you buy me a better bridge for my railway for Christmas?".
I asked her to put him back on, and said I didn't have any bridges right now, but I would see if I could find one or two by the time I saw him at Christmas, was that a good idea? He was quite silent, but sis assured me that he was nodding earnestly at his end of the phone....
I have a fab lifting bridge on order now, and I've got the dimensions of the substandard bridge, so that I can check if the simple arch ones on the local wooden toy market stall are bigger.