I don't think I posted about this boring yet nifty little project I did. Evie's been wriggling out of the 5-pt harness in her carseat. I was going to buy a 'seatbelt wrap' thingy, but they're $15 or so with no guarantee that they'll work.
So I made my own.
It's simply two rectangles of polar fleece, sewn together and turned right way out. Fold in the sides so they meet with about a 1.5cm overlap, and mark where you need to fold it. Sew three rows of strong 1.5inch Touch Tape, hook in the middle and loop on the two sides. Attach four snaps to the overlapping part.
She hasn't managed to get out of it yet. (Oh, and that's her "cheese!" face, not a grimace of pain.)