A picture of Bart's pet elephant, Stampy, which he won in a radio contest.
Added:

The Simpsons Season 5 Episode 17 Quotes

(Homer hits a steel deer statue with his car)
Homer: D'oh!
Lisa: A deer!
Marge: A female deer!

Lisa: Dad, I think he's an ivory dealer! His boots are ivory, his hat is ivory, and I'm pretty sure that check is ivory.
Homer: Lisa, a guy who's got lots of ivory is less likely to hurt Stampy than a guy whose ivory supplies are low.