formula for a good night in

image: design sponge

cut up old envelopes with cool tiny geometric patterns
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cut up vintage animal encyclopaedia + "valentine's annual for teens 1971" from Vinnies
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a whole lot of cut up white card
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a whole lot of card making
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a whole lot of cards

Recently got a bit excited about the possibilities of used envelopes after seeing this on design sponge. There's also a whole flickr set devoted to art on old envelopes!