Does anyone know the name of the children's watercolor book that you just add water and the color shows?

it's usually disney cartoon books.

Does anyone know the name of the children's watercolor book that you just add water and the color shows?
I enjoyed those books when I was a child and I bought them for my children about 10 years ago. However, I haven't seen them since then; this might be because I wasn't looking for them! I remember that pharmacies such as RiteAid would sell them in the toy aisle; perhaps they still do. Check a few pharmacies and Toys R Us. Higher-end toy stores probably wouldn't carry them.
Reply:just go to the coloring book section at wal-mart and look for a watercolor book