Painting guide with a canvas with numbers?

-When I was little my parents would buy me canvases that would allow me to paint really pretty pictures. These canvases were unique in which they were sectioned off and had numbers in the lines. A packet of paint also came with these with numbers on the paint lids. Directions also came with these like "paint this color with this number" and it would create an amazing picture that looked like it was done by an actual artist. Does anyone know what these were called or where I could find some online?