Spinning top

This toy is a variation on the spinning top, which has a longer top rod with a pinwheel-like object attached.  The child interacts with the toy by spinning the rod, and then watching how fast and how long the top resists gravity depending on how much force they used to spin it.  This toy would be most appealing to children around the ages of 3-6.  In terms of its construction, the top would be made out of wood, and the pinwheel would be made out of a lighter material, such as plastic.  This toy would be relatively inexpensive to produce, and the size would be big enough so as not to be a choking hazard to small children.