Unidentified Bootleg Doraemon Windups

Comes in a completely clear variant (aside from a few painted details, stickers, and googly eyes), through which you can see a colorful assortment of gears, and a yellow variant that has googly eyes, stickers, and a silver face. They have a little propeller on their backs, and when you wind them up, they should move across a surface, as the propeller spins.