Kids in preschools and kindergartens love printable coloring pages. My 3-year-old daughter loves coloring so much, she can do 6 pages at a time. When something she does not know well, she always ask mom or dad, “what the color should be?”, otherwise, she know the colors like red apples, yellow bananas, brown monkeys, brown trunks and green leaves, etc, she can color correctly. I guess a lot of kids in preschools and kindergartens like coloring pages.
http://www.coloring.ws/coloring.html and http://www.fisher-price.com/us/ms7/number-coloring-pages.asp provides free coloring pages for learning alphabets and numbers, so the kids can learn while playing.
http://webpages.charter.net/mortickles/coloring.htm has many free coloring pages of kids’ favorite Thomas, the Train characters! My daughter made the request last week, I promised her I would give her Thomas coloring pages, here it is, she will give me a big smile when she get it.