What a fun but naughty idea. My sons would probably call me "evil" for doing something like that. Years ago when they were small, I got tired of the package shaking and what not so I had a bright idea. I wrapped all the packages and did not put names on them. In a spot known only to me, I wrote a color, (red, blue, green) that I assigned to each of the boys. They never knew which package was theirs and to this day they still fondly remember Mom doing that. We had a really fun Christmas that year.