And because gift shops don't usually sell postcards of our favorite weird stuff that we saw, or the random imaginary stuff that we thought about.
Hence our DIY postcards, drawn in fine-point Sharpie on Bristol board that I cut to USPS standard postcard sizes. Thus Sydney was able to draw a Gateway Arch with sunflowers growing almost up to its top, a sight that I'd REALLY like to see in real life:
And Willow was able to send her impressions of the Real Pirates exhibit at the St. Louis Science Center back to one of her little playmates, who she knows would enjoy the idea of the swordplay:
I sent Matt a postcard of the Gateway Arch on which I diagrammed the location of all the mean/nice people and weird overheard conversations that I encountered--it wasn't as good as being able to poke him and hiss, "Oh, my God! Look over there!", but it was close.
One night, when we were working at the dining room table in my parents' house, I asked the girls to draw a postcard of their absolute favorite thing from the past couple of days of travel that we'd just finished. Here's Sydney's postcard: