It's really a coincidence to see this thread since just 3 days ago I made a set of car seat head cushions for DD. She fell asleep coming home from a day trip to the beach and her head was bobbing and it looked uncomfortable. I said to myself "This is not going to be good for the 16 hr drive to WDW" So I started planning how I'd make these things. She is in a pre-school size booster/carseat. On either side of her head are the guides for the car's shoulder strap to be threaded through BUT we don't use them yet bc. she still uses the 5 point harness that also came with the carseat and the carseat is secured by the lapbelt of the vehicle. So I got 2 pieces of foam, covered them with a pretty peach colored material. I had 4 tie-backs from curtains that I don't use anymore so I thread them through the seatbelt guides to secure the foam pillows on either side of her head. DD "tested" these and I got her approval! If anyone wants me to e-mail them a picture of this, just PM me. I've never been successful at posting pictures here in my signature, otherwise I would do that.