I put this picture on Twitter with the message "Count the triangles and win a pie", and received replies asking what kind of pie, and what kind of triangles were included. So l realised it must be a real competition. And now though the main prize is the print itself, and the pie is going to be a second prize. It costs £2 to have a guess, and all the proceeds go to Kidscape. Go to Just Giving to learn more, have a go and make your donation.