My son is in 5th grade and having his 1st communion on Maundy Thursday. DH & I got him a cross on a rope necklace. I got it at the Christian Bookstore. If there is a store near you check it out, there are a lot of nice things to choose from. I'm not sure how old the boy is that you need to buy for or how close you are to him, but another idea is a christian music CD. There is a good selection for young people. Our bookstore also had some nice shirts.
PP