I did these concepts earlier this summer for Monstermatic, an app that allows you to mix/match parts and create you own monster that you can interact with. And THEN you can send off to have your creation 3D printed. They're running their Kickstarter right now if you'd like to contribute. I'd love to see one of these guys in 3D.
Blog, (I have some sketch book stuff over there): monstermatic.wordpress.com/
These images are 100% © to Mico Studios, I'm posting with permission. DO NOT MODIFY PLEASE THANK YOU. You can share this unedited on Tumblr, (I don't have one), or other "hey, look at this cool thing" sites if you like.