The cheapest iv seen these were £5 elsewehere . Tesco had them £10 then reduced 5.99 and now £3.95 so a good price.
Also in my little pony for £6.60 was £10 http://www.tesco.com/direct/my-little-pony-magnetic-scribbler/509-2812.prd?skuId=509-2812
Unleash your creativity with the magical Disney Princess Magnetic Scribbler. With no mess and completely self-contained, this magnetic scribbler is perfect for on-the- go fun. The Disney Princess Magnetic Scribbler comes with 2 magnetic stamps as well as a stencil to inspire your little one’s creativity and imagination.