N8AUC,
I teach an astronomy class in Texas and sponsor our school's amateur radio club, K2CHS.
Anyway, as part of out unit on radio astronomy (solar flux, K-index, sunspot number, etc.), I had the students tune in to WWV and WWVH. We sent a reception report and within a week or so received a really nice packet of information (letter from WWV, QSL card, and a nice color booklet about the station's operation). The students were really excited to receive it!
So, as of 2016, WWV is still sending out nice printed materials in return for reception reports.
All the best,
Gerrit
KE5HVM