You can make your SketchUp model dance

LumberJocks.com: "This is a navigation device that is used for 3D graphics programs. I have seen people at work use similar devices but they actually do CAD for a living. I only do SketchUp for fun but this device is amazing. When you move the knob it is exactly like you are moving the object on screen. You can pan left/right, pan up/down, tilt, twist, turn, zoom, and roll. It sounds really complicated and it does take a bit of getting used to but it is really as simple as manipulating an object in real life."