Hair jewelry is big these days - you can find hair chains almost everywhere. This tutorial shows you how easy it is to make your own.
Now, you will want to cut pieces of the felt that would fit just right behind your stars. Sandwich that between the bobby pin prongs and stick it down wrong side up to the backside of the star. Do the same for the other two stars. Make sure to pay attention to where your bobby pins are pointing to - you'll want them to point inwards (towards each star).