Just picked this up in Home Bargains today and it has kept my 20month old and my 4 year old quiet for a good while! Amazon has the same for £4.99 with £1.29 postage.
There are 5 double sided sheets of glossy paper with 9 Little Einsteins scenes and one blank side. The glossy paper lets you colour, wipe-clean and then colour again and again. It has 6 nontoxic washable recoloritz markers and an eraser sponge. The packaging can also be used as a frame for your little one's artwork.