This is an old, old creation. It is made without concrete, terracotta, or other modern colorful blocks. Re-posted from an old, unused site for schematics. Hope it finds a nice home here..
I will confess the hardest part of this was the face/eyes. I'm still not 100% confident in how they look. I also never could get a mouth to look right. I started hollowing it out, and I built a piston powered entry way in the back after I made the schematic... but it's not hard! Plenty of room in the tail to use for redstone. In either case, I hope you are a fan of mass quantities of fluffiness: