Before I go into this, just know I have absolutely no experience making or designing yoyos.
So I had this idea, what about a yoyo that would work underwater? ??? I was thinking a yoyo made out of lead or something with a giant weight rings, and very grooved surface that would trap miniature air bubbles and bring them under the surface, so that when the yoyo spins, in covered in a haze of bubbles, so the water doesn’t slow it down. Of course, its bearing would need to be a special non-rusting alloy. So any thoughts on my idea?