Unlike a certain purple dinosaur, Chicago’s Purple Asparagus — a nonprofit group that uses fun and age-appropriate activities to teach kids about Good Food — is named for a real plant that is a springtime delicacy. That is kind of the point. Teaching children from very young ages about the benefits of real, whole, wholesome food is crucial to their developing healthy eating habits as they grow up, and that is the core of Purple Asparagus’ mission.