For the younger fact-fan, this book depicts and describes nearly 100 different dinosaurs, pterosaurs, ichthysaurs and other prehistoric creatures. The emphasis is on SIZE: how big, tall and heavy were these creatures? Which was the biggest (and smallest) of all? Each page has either two giant folding flaps, to reveal more dinosaurs underneath, or a 4-page concertina-fold pull-out, to reveal the very LONGEST creatures, on land and under the sea. Watch out for the life-size (young) T. rex footprint - big enough for young readers to fit their own foot inside!.