Here's another. You could piece the outside layer to use your scraps and use anything coordinating dor the inside.
http://www.cluckclucksew.com/2010/04...deterrent.html
Or they might be asking about a cover for a Bjorn carrier. Here's a link to a tutorial for that.
http://www.sewmuchado.com/2012/07/ba...-tutorial.html
Or they may want something for another type of baby carrier or sling. They probably want a car seat cover, but I'd ask to be sure before spending time doing it.