I swear mine looks exctly like this one.
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But the ad on the site says it offers a "chase" pattern. The one from Wal-mart does not, or I got a bum one 
I might just go ahead and order one from here and let my son have the other one for his bike.
Hey, I did have an idea for making this thing thinner. You could get one of those little 1.5v battery holders from RS and seperate the power supply from it. Just an idea...