I made embellished t-shirts for my sisters for Christmas last year. It was the perfect handmade gift because I knew there was a pretty good chance they would use them. I bought the t-shirts from the Old Navy Clearance rack (shhhh don't tell) and really lucked out with the ruched sleeve detailing. Wish I would have thought to take pictures of all three before Christmas. Oh well.
This is a really really easy beginner sewing project that doesn't require a sewing machine. I have grand plans for embellishments like these for summer dresses I'm making for my little girl.
I can post links to the embellishment tutorials I used if anyone is interested. I'm feeling lazy at the moment.