The Raspberry Pi, a credit card-sized computer designed to encourage children to learn programming, caught the imagination of millions when it was unveiled.

'Pi evangelists' are now busy trying to encourage children to start using the computer, to get to grips with programming. But how old do you have to be to get started?

Seven to nine-year-olds at St Matthew's Church of England Primary School in Surbiton, Surrey, have been given the chance to try out the kit.

As part of a wider technology event organised by the GoTo Foundation in partnership with Intellect, they tried basic coding in the Python language.

Video produced by Dougal Shaw