Human Sundial Plans Give us your address & postcode and we will produce a Sundial project folder tailored to your exact latitude and longitude. You will receive project plans and layout instructions for your unique playground sunclock, which will use a pupils own shadow to tell the correct time. The Sundial has both GMT and BST dials so there is no seasonal recalculation necessary. Interpret the project plans as simply as you like or alternatively try something more adventurous like the example shown. You will need an area of about 6m x 4m which receives direct sunlight all day to site your Human Sundial. No assembly required, for self installation.