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Grandad and Lenny are trying to paint the living-room. But Grandad's paint is very old and it's gone quite strange. It has stripes and patterns in it..... At first it seems like fun to make pictures with this weird paint. Lenny calls his picture 'Fang' because it looks like a creature, and Grandad calls his 'Mildred'. Lenny and Grandad decide to hang their pictures on the wall and go in search of frames. But when they return the pictures have disappeared. It looks like they've been stolen, but then they realise something else has happened.... That's when things start to go terribly, terribly wrong...