I've seen way to many threads that say something like, "How do I put pictures in my signature?" so here's the official thread with the answer.
Before you do this, upload the photo onto one of your albums on Kidzworld and wait for it to get approved.
Now click "View All". It will take you to your albums.
Step two: Click on the album the pic that you want is in. You should see this (except with your pics):
Step three: Choose the pic you want and click on it. You should see this (except with your pic):
Step four: Click on the button that says "Get Embedded Code".
Step five: Now copy the embedded code.
Step six: Go to one of your forum posts. Go down and look at your current signature. You'll see a thing in gray, right below your signature that says "Edit Signature".
Step seven: Click on "Edit My Signature." You should see this:
Step eight: Then paste the embedded code in the box.
Step nine: Press "Save Changes". It will take you back to the thread you were on. Then you can find your post on that thread, and look at your new, improved signature.
Hope this helps!