Try returning the gifts you don't want! I'd rather my kids do that (and have told them so) than have something they don't want.

You might try hinting about gift certificates. I did all amazon.com certificates for the family this year--nobody would give me any hints. They now carry everything but the kitchen sink, so hopefully everyone will be happy.
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May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey