I was nervous about asking my mum when I first wanted to start making plushies and cosplays, but she ended up being pretty cool with it. So you never know. As for the materials, felt is pretty much in any craft store or craft section of a store and runs fairly cheap. Poly-foam is the same location deal and is pretty cheap too. Fur fabric is a different situation. While you can probably find it in a fabric store, it's a little more pricey if you want a better quality. I think you can also find fur fabric in craft stores, but the quality isn't nearly as good.