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What is this???

I found this picture of some sort of NXT robot today... anyone know what it is? I noticed a few interesting things from the picture:

First, there aren't any motors! So perhaps this thing isn't supposed to move? On the other hand, it has a pretty big, open, frame, so maybe some different motorized components fit in the openings?

Second, notice the wheels in the back - they appear to be all taped up so that they can't move. Any ideas on why this would be?

Another interesting thing about this robot is the NXT Brick - it's upside down! Or maybe the robot is upside down?

Finally... the picture shows three sensors on the robot - 2 US sensors and 1 Light Sensor. However, if you look closely you can see that all four sensor ports are used, so there's probably another sensor on the other side of the NXT Brick. Judging from the positions and types of sensors, maybe this robot is supposed to track objects, possibly bright objects? Although that wouldn't be possible if the robot can't move...

So anyway, has anyone seen this before or know what it might be?


UPDATE: Due to a comment on the post, I had to admit that I'm the one who made this robot. Everyone has until the end of Monday, September 10th, to figure out what this robot's purpose is before I post the answer. I will be posting hints periodically until then, so "stay tuned". :-)

HINT 1: The open frame of the robot actually doesn't fit NXT motorized components - the robot does not use any motors. Rather, the frame is made to hold something...

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