They also make pretty presents if you find some color photos and reduce them to fit in the Zip-locs or in the pockets.
A waiter in a Chinese restaurant overheard me talking about tomatoes, and asked me what variety he should send his mother for Mother's Day. So I went back later with a clear trading-card-page stuffed with a variety of tomato varieties and he loved it.
I didn't have tomato photos, but I made up this page of Asian Brassicas just as decoration.