It's always fun to find some kids books about asthma. There are several on the Environmental Protection Agency- EPA website
Dusty the Asthma Goldfish is great for kids, and is also available in Spanish. I also have Helping Your Child Gain Control Over Asthma (which is also available in Spanish.)
It's always hard trying to explain to kids why they have to be a little more careful around pets, the outdoors, foods, etc.
These are worth checking out if you have time. And if you know of any other good books for kids with asthma, let me know!