It's the Twirlywoos - Great BigHoo, Toodloo, Chickedy and Chick, and Peekaboo too! Today, they're learning all about... Gone!The Twirlywoos watch a train going round and round a track. Then it disappears into a tunnel. It's gone!Here's a toy rocket. Now it's gone!This chunky board book helps pre-schoolers learn all about the idea of `gone'.