Five Children And It [DVD] £3.93 @ Amazon
Next best £4.85 at Zavvi
A Psammead is 'It', an ancient, irritable, ugly sand fairy, which five children find one day in a gravel pit. As a reward for finding him, It grants the children one wish a day, the results of which will last until sunset. The children soon discover that making sensible wishes without any troublesome repercussions is more difficult than they first thought!