The Lost Unintentional Adventures Of Danders

Here we have a mystery. In May of 2007, Danders was launched in a toy truck, exited Blisshaven Preschool and disappeared into the Metro subway system. At one point the class went on a field trip to the Smithsonian's Natural History Museum. I know this because I lent a few pages to the Museum to put on a wall somewhere in an area accessible only to the staff. But the rest of it, about 3 or 4 pages, went missing, like Danders.

I do remember that Danders bumps into a Smithsonian employee on the Metro. Who then press-gangs him into  the Mammals exhibit by offering him a high-visibility PR position for his species. This turns out to be standing in a display case with embarrassing guinea pig facts on a little sign. He's eventually rescued, but I don't remember exactly how. Anybody save the Washington Post Magazine from May to June, 2007? A substantial reward will be yours if you step forward in the next 15 seconds.