Snuffy and his friend Rosalyn at Snufflegarden in a brief appearance of the "School" episode of Elmo's World.
Snufflegarden is a preschool on Sesame Street, first mentioned in Episode 1556.
Located away from Sesame Street itself, Snufflegarden is the equivalent of kindergarten for young snuffleupaguses. Snuffy and Rosalyn are among the students, and some of the kids (including Snuffy) take the gigantic Snuffle-Upa-Bus to get there (as seen in Episode 2142). Snuffy often spoke of the school activities to his friend Big Bird, and on at least one occasion it has been seen as a physical location.