While there are puzzle books on the market that feature styles of compare and contrast games, there are websites devoted to printing "find the difference" images and solutions for use. KidsFront offers free picture sets that can you can print for home use or take on the go to keep kids entertained while traveling. After printing the sets desired, clicking the "show answer" button will provide an image containing the differences, which you can use to check the player's answers.
Kids can play an alternate version of the "find the difference" game using printed images or games from puzzle books. Instead of having players compare pictures while they are side-to-side, have them study one of the images for five minutes, then take it away and replace it with the second image to see if they can distinguish between the similarities and differences. This variation involves memory and recall tactics.
The Internet provides an opportunity to explore the world of games, and sites such as HelloKids offer hundreds of virtual "find the difference" games where players can choose to click on the differences using their computer's mouse or enjoy coloring the virtual images online.
Artistic kids can create their own puzzle games from scratch. After drawing an image by hand, they can create use tracing paper to create a second image, making it easy to maintain similarities while adding differences. The player can then look at the images and compare them. People familiar with creating source codes can also use Adobe Flash to design slides for a "find the difference" computer game.