Hungry Frog
This toy consists of three main components: the leaf as the base, Mr.Frog with a rumbling stomach, and a fly that is hanging off a tree branch. And the goal of this game is to let Mr.Frog eat the fly.
The fly is attached to the string by magnets, and is either manually or mechanically engineered to swing left and right. The frog can jump up by pressing a button on the side as shown in the sketch. This button activates a spring mechanism that allows the frog to jump up and open its mouth. Once the button is released, the frog will close its mouth, and if accurately timed, should capture the fly and fall back to the leaf.
This toy is designed to help children (5+) to exercise their attention, concentration, and reaction speed. It is also suited for multi-players since it allows for an added competitive component.
(idea: somehow when fly enters the stomach, rumbling stops, and resumes when taken out again)