Here is another one I just came across -
http://www.bigcomfycouch.us/clowndergarten/join.cfmIt is the Big Comfy Couch Kids Club, you will get sticker sheet and coloring pages in the mail.
Regarding the Peta coloring book, I realized I could have ordered all four and then when I tried for my other son it said you can only place one order per week, so will do that again next week.