There are just certain things you can't talk about with kids. I just totally do not believe in this sort of Bart Simpson character who infects so much of our literature and film and TV stuff nowadays, these know-it-all kids who seem to understand the hypocrisy of the adult world so thoroughly and can talk about it with such articulateness. That's bunk. Kids are kids; they're innocents, they really are. For a long time, no matter what they see, no matter what they're exposed to, they can't get it until they have developed enough.

One of the glories of doing the book So You Want to Be President? was the shifts in tone, where I was able to be humorous and then very serious. And the impeachment page is certainly the best example of that. I didn't have to think too much about how to present this one. I got the idea right away that a good way of showing the shame of President Nixon would be to put him down in the shadows under the Lincoln Monument, with Lincoln sort of glaring down at him from an elevated, better-lit position.

The whole basis of working in black and white and grays became the basis of my understanding of color, because it's all about tone, it's all about light and dark. If you don't get that, then your color work is going to be a mess. So that's the beginning of the toolkit: drawing and black and white media.

If, for some reason, I cannot bear to work on something that needs to get done, I'm not going to force that. I'll just take a mental vacation. I think the best solution sometimes to working out a problem is to walk squarely away from it.

You have to get through periods of being blocked. Everybody has them. For me, they have everything to do with self-doubt. It's never a matter of laziness or inability. It's just a matter of believing that what I'm doing is worthwhile, that it matters.I just make myself work. I just make myself go to work, whether I feel like it or not.

I open journal, I look at the picture and I remember where I was. And I remember the time of day, the temperature of the air, what music was playing, or who was talking to me, or who was looking over my shoulder and what conversations we had and the smells of the earth and the time of year it was. It's all there for me in a way that we don't get looking at a snapshot. Most of us look back at a snapshot from ten years ago and say, where was that? We don't even remember where we were.

What I try to do in my picture books is to be all-inclusive, but not exclusive, to not exclude the kid and not exclude the parents from the experience. And it's not a very easy task; you can't find stories that work that way too much of the time.