'I Wonder Why Spiders Spin Webs' and other questions about creepy-crawlies, 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 Spiders Spin Webs is the perfect introduction to creepy-crawlies. featuring busy bees, musical grasshoppers, clever builders and more. Glossy paperback. Approx 28cm x 23cm.