Audace absolutely loves to play with the twine - a length of about 6 feet of regular, plain ol' ordinary twine tied to the tail of a toy mouse. I can't believe how a non-store-bought toy like this can keep his attention for weeks and weeks. We now have two of these things, so that Grace and Ruse can play whenever they feel like it - but mostly it's Audace. He just lives for this type of play. Gotta get a movie of this!!