Greetings from the North Pole,
Thank you for visiting our sub and thank you for wanting to help out a family in need. There are several ways you can help out a family in need, the first step would be to find a user you would like to help then you can do any of the following:
Purchase a gift directly from their amazon wishlist. If you click on their wishlist and hit "Add item to cart" then check out it will automatically add their shipping address to it so that when you pay it will be sent directly to that person. If you run into a wishlist where you see only your address it means the person doesn't have a mailing address set up for their wishlist and needs to do so.
You can offer to mail them gifts or a care package through the regular postal service and pack/ship them gifts yourself.
You an post an "Offer" and offer to purchase gifts from wishlists or offer new/gently used items such as clothing,toys,etc please state where you are able to ship/help in your post as we have requesters from all over the world.
I hope this helped, if not feel free to ask any questions!