The triceratops was originally drawn for panel 2 on page 7 of my 2010 comic Martian Debut. I used a plastic figurine as a model. The bubbly background was drawn for panels 3 through 7 on page 1.
The face is a print of artwork made for panels 1 and 2 on page 10 of my 2009 comic Flying Solo.
The 3 images were collaged together in 2011.