'Who drew on these tree trunks?' Charlie asked Max. 'They'll be in big trouble if Mum sees that!' Take a walk through the Australian bush with Charlie, Layla, Cooper and Max. As the children discover a world full of natural wonders, brimming with native flora and fauna, little Charlie's mind is focussed on one thing . . . Who, or what, has made those marks on the bark of the Scribbly Gum trees?