Even though I have this solid career in picture books, I've not only been thinking about kids - because I don't think that much about children; I'm not a child educator; I'm just a former child.

I used to teach on a college level, and I've taught in schools where kids just wanted to be artists, and I used to be furious with them if they didn't read, because they just seemed so - their education seemed so thin if all they could do was pick up a paint-loaded brush and fling it at a canvas. I mean, there was nothing to express there, except maybe their own personal feelings. But if they're not - if they don't have a grounding in the way these things have been expressed by other people down through the centuries, then they're lost.

Art - I had never thought of that as a career because it was like something I did so naturally, and it was fluid, and it is. And even though I still admire literature as the superior art form, I have to admit that art, for me, that's it; that's what I'm good at, and that's what I should be concentrating on.

Teenagers are always sneaking around in drawers where they shouldn't go and reading things they shouldn't be reading. And that's an attempt to try, I think, to penetrate, that's how I found out as a teenager what was going on, was by sneaking into drawers and reading letters that I had no business reading.

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.

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.

My interest really is psychology, what's going on in people's minds as revealed on their faces and in their posture. That is my strength. And it's something that came from probably being a silent observer for most of my life and having to read what was going on in people's minds from only their postures or from their expressions.