I was feeling sad for Mr. Charlie's red neck from his car seat and stroller straps. I know you can buy strap covers, but I found this very simple tutorial. Plus it's fun to brighten up the car seat with a fun print. This project cost me $0 since I had everything on hand. Even better!
Note: This size seemed perfect for 8 month old Charles, but I would shorten it an inch or so for a smaller baby since it would seem too big for the smaller settings of a car seat strap. I'd measure it against the strap before I cut it.