Once the picture has downloaded, right mouse button click on it to save it or print it out. The number follwing the picture description is the size of the file. K is kilobytes and 21K is 21,000 bytes, but don't worry the pictures are all pretty small.
For more Blue's Clues colouring pictures, visit Blue's Clues. Here's the link directly to Blue's Clues coloring pictures. Have a look, Slippery is my fav.