Pod is saving up for the latest gadget in the Stone Age so he's babysitting baby Nim.

She's just about learning how to speak only she can't quite get Pod's name right - much to Pod's frustration.

But after her swing flies off, Nim ends up sailing downstream, dodging a huge fish, a sabre-toothed tiger and a waterfall.

When her mum gets back, Pod thinks he's gotten away with it... but at the last moment Nim says 'Pod' perfectly and lands Pod in hot soup!

Illustrated by Richard Watson.