Aquadoodle's Peppa Pig Doodle Bag is perfect for keeping kids entertained on the go, with none of the mess you normally associate with paints, pens or watercolours! The secret’s in the mat. Simply fill your Aquadoodle pen with ordinary tap water, run the nib over the magic mat and see the colour appear! Any water that does run off the mat, runs clear. No mess, no stains, nothing to worry about. As the drawing dries, designs fade away, ready for the mat to be used all over again.