Over 20 feathered dinosaurs from the Jurassic and Cretaceous periods are illustrated along with details as to their size. Included are such notable dinosaurs as the Mononykus, Oviraptor, Troodon, Avimimus and Ornitholeptus to name but a few. This superior quality puzzle will delight and educate all at the same time. Strong high-quality pieces that won't break. Easy fit puzzle pieces. Made from recycled board.