Ask HN: How should i donate my profits to charity?

HN, I have always cared about charity. I have been donating a certain amount of my income to charity even before i started earning. Now i starting an online store...with one product..i know the product is quite good(really good design and functionality) and it will sell..but i somehow want to give a certain portion of my profits to charity. How should i go about this?..I dont want to give 10% or 20% of my income to charity as a whole...instead i think i should give a certain amount on every product sold...my product costs around $40-$50..i can give up to $10 to charity( in the form of products like shoes or books) on ever product sold...so that i can keep a count...any ideas what should i go about it..what should i give that is worth $10?..I want to give it to charity which cares about the development of children. I am from Pakistan..currently i have SOS village in mind. http://www.sos.org.pk/

help me out?..Do you support this kind of thing?