Intro to Science - Day 1 question

So a new semester begins again and I have a new question to get my students to start thinking logically and in a scientific frame of mind. (my previous Intro question)

Which one of these boxes is not like the others? Explain your answer.

So far, out of the people I have asked (before my lab actually started):

      Undergrad - 1 answer which was wrong (did not answer the question)

      Brand New Grad Student - 2 answers both of which were wrong (did not answer the question)

      Finishing Masters Student - 3 answers all correct

      Finishing PhD Student - ~6 answers although needed to be coaxed to actually answer the question

My conclusions are that the more education you have the more you over think the question.

Out of The Box Geological Lesson Ideas

So I set up a new portion of my website under the GeoEducation banner for my Out of The Box Geological Lessons. The first lesson up is a retooling of something I posted about a little while ago, which was my Introduction to Science lecture (now in PDF format). I should have a new post up in the next couple of days with another OoTB Geological Lesson idea.

Teaching Geology - Intro Lab

So I decided to take a page from a friend of mine and try something different for the intro Geology lab this semester. He had people come in and organize their shoes in whatever way they liked then describe their organization. This was to show people that science is about organizing information in a way that makes sense and people can understand.

Since I can't stand people taking off their shoes near me I went a different route. I have a whole bunch of random stuff that is all very similar that I could use for this assignment. And I will have the students organize this in whatever means they see fit as a class, then describe their organization.

The items:
Football thingy
Aerobie
Wobble thingy (the yellow and green thing) that is 2 ovals attached to each other
Boomerang
Roomerang (a boomerang made of foam so it can be thrown indoors)
Circle thowing thingy (I wish I knew the name of some of this stuff)
Racquetball
Squash Ball
Tennis Ball
Ping Pong Ball
Golf Ball
My dog's ball
Foam globe
Giant Foam Die
Regular die
20 sided die

So any comments or suggestions?