Don't toss it, Use it.
You can use scrap leftover paper, packing from paper, embellishments, bits and pieces of leftover embellishments or anything craft or non craft related.
It's up to you, just have fun with it and use things in a way you would never even think to use on your creations.
Here is my creation for this challenge:
My recycled items include the cardboard backing of an embellishment package, scraps of 7 gypsies paper, and a skull from the packaging of rub-ons from Creative Imaginations. I used "Valentine Betty" from Simply Betty Stamps and colored her with copic markers and Atyou spica gel pens.
I can't wait to see what you come up with for this RECYCLE Challenge.