Yoghurt and pencils

The breakfast stuff was on the table this morning; cereal, two-fruits and the tub of yoghurt. Michael is a big, big yoghurt fan. Usually theres also a wide range of junior arts and crafts materials, but we tidied the table on the weekend. Marcus got three-quarters of the way through his cereal and said "I've had enough - I want to do a drawing of a monster". He hadnt even looked around for the bucket of drawing things when Michael asked politely "Put pencil in yoghurt?"