You know that magic trick where the scarf just keeps coming? Apparently magicians need to be using this trick on infants. They love it.
Tie a bunch of scarves/rags/fabric pieces together and stuff them in an empty tissue box (or wipee box is even better since it encourages them to open and close the lid). At first, let a little hang out of the box to encourage them to pull.
Age? I think he first did this around 8 months
Try Again? This just became a toy always available to him. It lasted a couple months.