If Dogs Were Dinosaurs by David M. Schwartz and illustrated by James Warhola looks like a book for preschool dinosaur lovers, but it is acutally a book for elementary-age children that demonstrates the math concept of relative size. The silly concepts combine wonderfully with the vivid illustrations, bringing humor and fun to math. Children will enjoy the book and it easily extrapolates into them coming up with their own relative size humor. Recommend this one to elementary math teachers to get it into the right hands.