I gave this book to my four-year-old son today. I have to review it now because he wants it back so we can read it tonight. It's just that good.
The text is simple, with an unforced rhyming scheme, so reading the book is a pleasure. Also, although the text was simple and straightforward, even I learned something about robots.
And then there is the illustration. The text may be simple and straightforward, but the artwork is not. Manic would be a fair description, but manic in a good way. Manic as in "it explodes off of the pages" way. The two-page spreads have five to twelve words -- the rest is given over to the illustrations. From corner to corner. And cover to cover.