I love to upcycle material! In fact, I make my children’s clothes out of mainly recycled material. When I have scraps I make buttons 
https://folksy.com/items/6893079-Upcycled-fabric-buttons-3-pack-
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I made this peggy doll from larger pieces of fabric and some leftover tapestry wool. I don’t know how safe it would be to sell, but I loved making it and it gave me a rest from quilting.
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I make patchwork fabric with my leftover fabrics.
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I sell my stained glass scraps on Ebay for mosaicing. My fused glass scraps I squish into frit and use in my fused glass creations.
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With our wool roving, we felt acorns, with our leftover yarn stash, we make granny squares for blankets-not necessarily for sale!
I try hard for there not to be leftover and buy according to how much we will need to avoid waste but sometimes I am not so disciplined 
I am thinking of papering my walls with paintings that I can’t sell or don’t like…lol
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