A book offering a plethora of possibilities for interaction (color concept, spatial reasoning, prediction, and types of transportation for a start) begins with a page spread showing a rectangular pattern of yellow, green, blue, and red blocks with die-cuts suggesting a shape. The text asks, “What are you building? What can it be?” A page turn shows the die-cut shape surrounded by white against the block pattern on the previous page to reveal a vehicle made of blocks: car, bus, train, ship, rocket ship. The full rectangle of blocks and two questions repeat on every other spread before the next reveal, giving a sense of pattern and order to the book as a whole that is also visually suggested by the repetition of the block shapes in this clever, developmentally appropriate board book. (Ages 1–3)