Could this be a good idea?

I was recently uploading a some graphic files of animals & nature. I was wondering if you could give me some advice if idea is good (if it is, how to make pictures better) or should I just end because idea is horrible. Pictures were rejected 2 times.

PREVIEW IMAGE : http://i.imgur.com/8eCTV.jpg?1

Thank you for your time!

If you can make them look like stamps, it would be fun for kids

yes of course you can make them looks like stamps and preview them as they are used in greeting cards, the authors and designers who designs greeting cards will purchase them

Thank you all for good advices, I will try to make them look like stamps.

If you start with a photo that has a lot of contrast, you will be able to create the best stamps. The trick behind getting a good rubber stamp effect with lots of detail is to start with a LARGE, HIGH RESOLUTION photo. The more pixels, the more fine detail in the stamp.