Ceri the cat and Deri the dog are best friends who do everything together and love to learn new things.Ceri and Deri show Dai the Duck that joining in with live action is much more fun than watching it on the telly in this hilarious new addition to the quirky educational children's book series.- This colourful picture book in the Ceri & Deri series combines straightforward language and simple illustrations to effectively introduce young children to the tricky concept of time.' Booktrust - This educational story with it's big bold pictures is perfect for teaching children to tell the time. The series includes Good to be Sweet about learning division and both would be useful for the classroom.' South Wales Evening Times