That is a bit harder to do by mail! :D What I had everyone do was design and prep card kits. Since we couldn't mail stamps and such to everyone, the stamping had to be done as well as any special techniques. Then the original was placed in an envelope so I couldn't see it (because I wanted to play along, not just host the swap). Everyone received their card kits and have been assembling their cards, using what was received in the kit and their imaginations. I did allow adding extra stuff or altering what came in the kit if they wanted.
Sara and I took two spots, so we each ended up with twenty cards! It has been so much fun working on these! I finally finished the coloring and am posting my cards as well as the originals here. Except for one photo (which I will note), the original artwork is the card in the center. Thank you girls for a really fun and incredible swap! If I messed up names, please let me know. Ready?
This card is by Mary. maryb3 on SCS. I really like the pink on black. Mary also included little sequin flowers and cute little dots. My butterfly on the right has wire antennae. I really need to practice more with wire.
Here is Diane's card. ppq on SCS. Love these happy colors and those scallop punch flowers. 
Here is Misti's card. misti.stowell on SCS. I seem to have been a little placement challenged the day I put these two together. This card is great. It makes me think of my grandpa. I sure miss him.
This one is by Beth. mycatbillybob on SCS. I got such a kick out of the flamingo "conga line". I had to add some ribbon to the one on the left to have enough for the ribbon frame. For the card on the right, I cut up the conga line for the front and put the large flamingo inside. For those of you wondering, here is a ribbon frame tutorial by waltzingmouse.
Here's the inside.
This one is by Jen. ilovebuttons on SCS. She used some kind of cool sparkly chalk-like stuff on her card. I felt bad for the frog, being in a jar and everything, so I named the one on the left Houdini and replaced him in the jar with the birthday wishes!
This one is by Megan. megsberger on SCS. Megan, I loved this card, but it made me crazy trying to figure out what to do with the green square only for Sara to finally tell me you placed it on the back of your card! I laughed so hard at myself! 
This is the back. ;)
This one is by Diane. ldyglfr62 on SCS. These little mice are A. Dor. A. Ble. And I learned the hard way on this card that I am not a good colorer. For the one on the left, I used my classic ink. I like the one on the right using watercolor pencils much better!
This one is by April. aahannah59 on SCS. Super cute and all I added was ribbon.
Here is the inside.
These are by Sara. Chicagogirl on SCS. I love these cards! I am a big fan of earth tones. The blue card is the one I messed up placement for the photo. Sara's original is actually the card on the left.ETA: I just realized I never took a picture of the inside of Sara's butterfly card. Drat!
These cards are mine. The brown one has a shadow box, but instead of filling it, I put a brown rub on flower inside and a lighter flower on the window. It looks shadowed. For the pink card, I stamped different sentiments on each side of the white CS, so people could choose which one they wanted to use. I let Xavier help me with the stamping on a couple of the envelopes and he took it upon himself to continue stamping without me in the room. Luckily, the inkpad was closed. I kept the one he goobered up the most and hopefully no one knew a 3 year old stamped their envelopes before reading it here now. :D
I don't think the one in the middle trusts me. ;)
