I'm a great fan of gluing stuff on brooches - you could print out your club name, glue it down on say a wooden disk (they come in lots of shapes), glue ephemera, rhinestones, gem chips, whatever relates to your club. You probably want to seal the paper parts with clear acrylic varnish (it dulls rhinestones, so don't cover them), glue on a pin back, and voila, you're done! You can also use dimensional paint as "glue" - put a thick layer on your disk, and implant the rhinestones, etc., while the paint is wet. If you're gonna make several of the same thing, you could get a production line going. We'd love to see a scan of what you come up with!
I have some samples of this type of thing on my website, look under ETC./Blessed Pins.
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And on auction: Using paint as "glue":
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These - I glued holographic paper to a wooden disk, then glued vintage jewels to it:
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I also have a lot of fun gluing shells to shell fragments, or pieces of poly clay. You could build a poly clay background and attach things to that, similar to this:
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To see more shelly things, just look for my auctions called "Sea Shards". Why not make it a group project and gather materials and let the others get in on the creative process? They wouldn't necessarily have to be alike, let everyone express themselves! HTH