DIY happy has a fun how-to on making a ski cap with headphones in it. Sam writes “Burton sells a really cool cap with integrated headphones for listening to music while participating in winter sports. These hats are well made, but they cost around $40. That’s why Digital Cameron and I set out to make our own. We used a pair of old Koss headphones that had been chewed apart by Digital Cameron’s dog, and a hat that we picked up at a reasonable price from a local retailer.” Link.