This is another roly poly fidget toy inspired by WildRoseBuilds Rolling Ellipses (https://www.thingiverse.com/thing:2539851), but this one prints as a single piece and doesn't require any spare change like my other roly poly toy. (If you are loaded, check out: https://www.thingiverse.com/thing:2541854)
It prints standing on end, but it has a built-in break-away cradle that holds it up while it prints.
UPDATE: I've added a convex-hull version. It rolls the same but looks different.
UPDATE: I've added versions without the base.