How Do You Get Melted Crayon Out Of My Fabric Car Seat?

Try an ice cube to harden it then peel it off.

Use a can of spot shot to loosen it up

You need to warm the seat up so that the crayon melts again and you then need a silly and also very hungry cat to slurp up the crayon. I have not tried this myself, but my great great aunt swears by it!

Take a towel or washcloth and an iron out to the car.  Put the towel over the crayon and rub it with the warm iron to melt the wax and it'll cling to the towel.  It's the same thing you would do for candle wax.