Hi...hope I'm allowed to post here, since I don't have a Dissociative Disorder or know anyone with one, but I found this site and I thought maybe younger alters would like it:

Artpad

Grownups might enjoy it as well. Once you've finished your picture, there's a link on the left-hand side you can click on called "Save and Send" - it will email the picture to you, and give you a link that you can post here if you want everyone to see it.