Article from the Stamford (CT) Times about their Purple Bus,...and here's a photo of same.
From the paper: What is big and purple and carries school children? The Ferguson Library's Purple Bus, of course. This fall marks the 10th anniversary of the library's Purple Bus service.
The eye-catching Purple Bus brings classes from Stamford pre-school and elementary schools to the library during the school year. Last year, 138 pre-school and elementary school classes visited the library on the Purple Bus; a total of 2,953 students all together.
Younger children receive an introduction to the library while the older students learn how to perform research using the library's many resources, including the online catalog and research databases.