Why did the sunflower go to art school?

This joke is a delightful example of wordplay, specifically a pun, that hinges on the double meaning of the phrase "draw attention." When we say someone "draws attention," we usually mean they attract notice or make themselves conspicuous. However, in the context of art school, "draw" literally refers to creating images with pencils or other tools. The humor comes from the unexpected twist of applying the artistic meaning of "draw" to a phrase that usually has a social meaning.

Sunflowers are, in fact, masters at drawing attention in the real world. Their towering height and vibrant, sunny yellow petals make them stand out in any garden or field, naturally attracting the eyes of passersby and pollinators alike. They even famously turn their heads to follow the sun, almost as if they're trying to get the most spotlight! So, the idea of a sunflower wanting to hone its "drawing" skills at art school playfully connects its natural inclination to be noticed with the literal act of creating art, making for a charming and lighthearted chuckle.