The thing is this is just not a good way to help people.
Religious charities and groups like Rotary tend to do these shoebox appeals because it is popular with donors and because it gives people who want to take a one week mission trip to an orphanage something to do.
Professional aid organisations like Oxfam, Save the Children, Action Aid, Christian Aid, CAFOD etc...don't do this - it is not to do with secular vs religious it is just because it is not a good idea. (NK2d87aac7X114d622b941 Comic Relief don't do anything directly - they just fund others, but I doubt they fund anything like this).
strawberrycake After the Haiti earthquake and other disasters ports and depots get clogged up with donated clothes, water, food, medicines etc...which people have donated with the best of intentions. Food rots, urgent aid doesn't get through. Aid agencies and governments that are at the frontlines try to tell people not to send stuff, donate money. Its not arrogance, its trying to save lives.
Sure send shoeboxes if you want, its not the worst thing in the world, but you have to know that 1) you are supporting an organisation whose mission is not about humanitarianism but about saving souls 2)The money you spend on gifts could be better used by another charity 3) You are teaching your child lessons about aid ('send stuff') that just aren't useful.
If given all this you still want to do it, fine, we all do all kinds of irrational things. But schools should think twice before promoting them.