On this page are some examples of designs for t-shirts that I made with head movements, without hands. Explanation about how I work with only my head can be be found on this page of headdesigned.com

There are 2 online shops: AssistiveWear a.k.a. HeadDesigned (few models, but screenprint quality), and Zazzle (lots of designs, great shop, but no screenprint).

Black Cat
at HeadDesigned, and Zazzle

Salamander - Simple brown
at HeadDesigned, and Zazzle

Cell
Get it at Zazzle

Sun
Get it at Zazzle

Endless T-shirt
Get it at Zazzle

Different worlds
Get it at Zazzle

Happy Horse Jumping
Get it at Zazzle

Eye Tattoo
Get it at Zazzle

iSuffer
Not available in the shop

I have a great solution!
..but you may not use it
Get it at Zazzle

Me
Get it at Zazzle

Sun #2
Get it at Zazzle

Ladies Rugby
Get it at Zazzle

Spider
Get it at Zazzle