Lizzie and Dad live in a rainy town in the north of England.

It's just the two of them, and Auntie Doreen, who pops round to check Lizzie's spellings and tell Dad he's daft - and make them nice hot dumplings.

But today there's something unusual going on: why is Dad building himself a pair of wings and studying the birds to see how they fly?

The Great Human Bird Competition of course!