How secert do you want it to be?
You could pack up a few boxes labeled with eack person and go to the nest town to mail it. Or maybe you could have someone you trust and they do not know to drop it off a few days before christmas.
Check out cheaper places!!!! Target Clareance (of course), Dollor General has tons of name brand toys!!! Dollor Tree for coloring stuff, stickers, cups, candy and hair stuff.
See if your work could chip in and make it a group project.