Malorie Blackman 
Snow Dog [EPUB ebook] 

"IT’S GOING TO BE WOOF-ONDERFUL!"There is nothing Nicky wants more in the world than a dog to play with. But Mum and Dad don’t want a dog. Then Grandad has an idea – he and Nicky can make a dog: a snow-dome dog. Even better, he has some special clay, found at the end of a rainbow, so that the dog will be extra-special. Maybe even magic . . .