Barry the worm theme song:
Mud, mud, mud / That’s what he loves to eat.
Friends, friends, friends / He’s got a lot of them.
Pink, pink, pink / That’s the colour of his skin.
Worm, worm, worm / That’s because he is a worm.
Fun, fun, fun / That’s what he likes to have.
Bird, bird, bird / That’s what he hates the most.
Start, start, start / It’s time to start the book.
It’s Barry... the worm / Barry!

For the curious: sprior.com