We met beforehand to talk about what to see and where to go and gave them our guidebook, look at pictures and just generally talk about travelling.
I still loved the postcard though and thought it to be funny :)
They didn't find real stamps, so they used this mailing label - can you see the two different dates? They sent the postcard in early March, which is what the label says, and it got stamped again in mid-April - more than a month later! I wonder what the did with the postcard in the meantime...