'With the help of a magical book, Noah Wriggle and his best friend Blue like to design weird and wonderful animal mash-up creations - and then bring them to life! But sometimes their mash-imals love being alive just a little TOO much... In The Speedy Spidersaurus, a scary T-Rex is mashed up with a tiny spider, creating an eight-legged dinosaur! But when Spidey gets loose at school, can Noah and Blue track him down before their teacher does?'
Source: Publisher's blurb.