These are bamboo shredders!  Little woven pieces of bamboo, colored to make them interesting.  Chinchillas and other small animals love picking these up, throwing them around, chewing them, and shredding them to pieces!  How fun, right?
These come 8 to a pack.  We try to pack two of each color (teal, pink, purple, and blue), though sometimes there will be more of a certain color than others, depending on what is in stock.