Turn your back on a baby in a shopping cart for one minute, and your cart's bound to be filled with surprises. But this board-book version of an infant's shopping spree is surprisingly benign. ``What does baby want?'' Brightly colored pictures provide the answers, among them, milk, sunglasses, bananas, a paintbox. Truly all things an infant might desire, but not the 20 packages of matchsticks or marshmallows that are within reach. Wellington (Night House, Bright House, 1997, etc.) keeps the page so uncharacteristically simple that it might be best to think of this book and its companion, Baby at Home (0-525-45640-6), as bound collections of vibrant flashcards for parents intent on brain-building. (Board book. 1-3)