'I Wonder Why Penguins Can't Fly' and other questions about polar lands, from Kingfisher books. Rrp £5.99 so get it for LESS than half price here! Colourful, surprising and full of information, the I Wonder Why books have set thousands of young minds buzzing. I Wonder Why Penguins Can't Fly is the perfect introduction to polar lands, featuring grumpy bears, record-breaking birds, polar pioneers and more. Glossy paperback. Approx 28cm x 23cm.