My daughter works at a school that is an academy for children that have been removed from their homes for some reason and are on welfare. For the most part these are high functioning children ranging from 7th grade to 12th grade graduation. They usually are transported to buy clothes and shop for personal items. So gift cards are appreciated because they are able to use it anyway they like. The idea of Walmart or Target or even Best Buy is good because they have everything from electronics, CD,s, DVD's, books and clothes. If you have a store of similar nature - they would appreciate it.
Something to open you can buy some socks of a famous brand - or maybe an inexpensive wallet with the card in it.
Not sure how much you are supposed to spend.