This circular board is designed for wearables, and at just $10 you could probably budget several to sew into your textile project (donโ€™t worry, itโ€™s washable). The TinyLily Mini is smaller than a quarter and is Arduino compatible โ€” in fact, itโ€™s an homage to the Arduino LilyPad, bringing you the same processing power at a fraction of the size.