Purple, Green and Yellow by Robert Munsch
Brigid asked her Mum to buy her some colouring markers so that she could draw wonderful pictures like her friends. She soon got tired of these markers and wanted ones that smelled like anything you wanted. Once she got these she tired of them very quickly and wanted some super-indelible-never-come-off-till-you're-dead markers which she used with disasterous results! This is a favourite from the author's live storytelling sessions. Brigid is on the trail of the ultimate felt marker. At first, she's satisfied to be drawing wonderful pictures. But soon she must have the markers that wash off with water. Then she needs the markers that smell. Finally she finds people-coloured markers...