This image is from John Tenniel's original illustration for Alice in Wonderland by Lewis Carroll, originally made in black and white. It depicts a hookah-smoking caterpillar giving advice to Alice and was made in 1865. .~ Feel free to customize the inside of the card with your own greeting, or even change the background color.
"The small symbol in the lower left is composed of Tenniel's initials, which was how he signed most of his work for the book. The partially obscured word in the lower left-center is the last name of Edward Dalziel, the engraver of the piece." Wikipedia