Hi Erin!
I did this 2 years ago and agree that it's a great idea! One of my pupils was diagnosed with lukemia at the time and i felt so helpless - that was the only thing i felt was in power to do. It was easy too - you just tie your hair in a braid get it chopped off above the elastic and then pop it in a plastic bag and post it. Your hair does have to be quite long - my braid was about 12 inches.

Great idea Erin! i hope you inspire others!
~Kathy