With some CGI, I think the brain slightly perceives that things aren't real. There's no gravity, the light's not quite real, the shadows aren't quite real.

My father, an architectural photographer, was an incurable tinkerer, maker and mender.

Like my father, I would never as a child throw anything away, keeping old toys, electric motors and bits of broken machines under my bed in what I called my Box of Useful Things.

Wallace and Gromit's contraptions are created purely for gags, but we all have the urge to invent - especially children. If they're bored, kids will make something from cardboard boxes, yoghurt pots, tape and elastic bands. Often, those constructions are the best.

It's very hard to adapt something. You end up changing it too much to make a good movie out of it. I prefer to work with things that are custom made for my kind of animation.

Mainstream animated movies are dumbed-down and sanitised: they make the world in their own image rather than exploring the limitless possibilities that are out there.