More to explore:
DIY Seat belt Pillow :)
Homemade seatbelt pillow! Awesome idea for those sore-necked kids!
Since the other tutorial vanished, I will make one of these, because we just got a new car seat. I will choose cotton, however, and maybe velcro.
DIY seatbelt pillow... http://athriftymom.com/seat-belt-pillow-diy-look-what-i-made/
seat belt pillow DIY TUTORIAL!