Funny comments always seem to surround tops. People are amazed at the most basic tricks. Now that I can do a merry-go-round (only once around and back to my hand) the "Oh wow" factor is really high. With an audience I throw a top to the ground, then sky rocket. Boomerangs follow. People seem to get the idea, top on the ground - top in the hand - skip the ground. Plus it is more impressive at my skill level since a miss is more forgivable if it is not the first throw.
Do I have my history correct? Duncan held the trademark on yoyo. All other makers used the term "return top."
So a yoyo was a kind of top. Now a top is a kind of yoyo.