i'm told i even sparkle about things like brussel spouts. >> stephen: how would you sparkle about a brussel sprout? >> are you kidding? oh, my god, brussel sprouts, and they're roasted. that's a real turn-on. >> stephen: are you going to yell through this entire interview? >> no. really by sparkle we mean what is it that makes your heart sing? >> stephen: you know what would make me sparkle? if we could sing a little song together. >> i don't think so. >> stephen: you've also written a series of books about "dumpy the dump truck." >> those are for very young, young men. >> stephen: very young. "dumpy the dump truck" spoke to me. >> really? >> stephen: how does dumpy learn how the take a dump? >> well, he just does that automatically because that's what he is. but don't go any further. >> stephen: ever thought about extending the series to other objects? are rusty the trombone? >> no, we haven't got there yet. we have a lot of other books, but we haven't done the trombone yet, but good idea. >> stephen: yeah. trombone nobody wants to play. [laughter] because it's all rusty. >> rusty. >> step