Listen to the sound clip Hello, hello there. Z and I are underground with our friends the worms. Take a look at these worms. They look alike, but some worms are longer than others. One of these is the longest worm. Can you find the longest worm? Is it this one? No, no, she's a longworm, not the longest. Could this be the longest worm? No. No, she's longer than the first worm, but certainly not the longest worm of all. Is this one the longest? Yeah, brilliant. She is the longest worm of all and is long. from Rebecca Davis: