Universal Shopping Cart/High Chair Cover (with pattern and tutorial)--I'm not so much worried about the germs, but when Olivia was a baby and couldn't sit up in the shopping carts yet, it was so easy to just lay down a blanket and let her hang out in that part of the cart anyway. I think this would be easier and probably get a lot of use. Especially since it would also be good when the baby's big enough to sit up, but still little enough to fall over a lot. :)
Decided to make my own set of shopping cart icons and share with the community. There are 3 different sizes, but everything is vector (you know those creepy half-filled pixels after resizing even vector shapes in Photoshop). Feel free to use and share.