Here's a quick-turn-around materials exchange that doesn't require any art.
For this swap, those who have a Washi Tape collection can wrap *4 Washi Tape strips around a plastic piece and send in to be swapped with other participants.
One to four groupings to exchange,
sample tape lengths approx. *6"-8" each.
Then we can look forward to another Washi-Tape-themed art exchange (either Post Cards, Artists' Trading Cards, or Artists' Trading Coins format, not determined yet) in the early fall.
An example of One-Color-Family Tapes:
An example of Rainbow-Variety Tapes:
An example of Patterns Tapes:
or any arrangement or color combination you want to share, including thin or wide tapes, metalics, etc.