Tomy Draw N Go Aquadraw

My girls have a large aquadraw mat and a travel size one. I think they are a great idea as it doesn't create any mess and it doesn't waste any paper. Around the edges there are numbers and letters that children can draw over and copy. This is how my Daughter is learning how to draw her numbers and letters. There is also nice bright pictures on them around the edge. You fill the pens provided up with water (screw caps that screw the opposite way so children don't keep opening them) then they can draw away. There must be a blue backing sheet and when the front sheet gets wet it turns see through so you can see the blue come through. When the water dries it goes ...