A toy gyroscope is a fascinating toy. When you spin the wheel at high speed, the gyroscope is able to stand up vertically without falling over, as the video below shows. In fact, the gyroscope has the unique ability to resist changes in its orientation, and this ability is what makes it so useful as a navigational instrument in vessels, such as ships and airplanes. It can be used as a reference orientation which stays constant over time. No matter which way the frame around the gyroscope wheel is oriented, the wheel always remains in the same orientation. So if the wheel is oriented level with the ground then it becomes a reference for indicating what orientation a vessel is with respect to the ground.