Larry and Sean

Larry (snake) slowly approaches Sean (spider) until it is sensed by Sean, who will eventually jump away.

With Larry and Sean, the child learn about gravity as Sean always returns to the floor when he jumps off, no matter how the child holds the platform. He/she may also learn spider-snake mechanics.
Larry and Sean are loaded onto the grass platform. The child may wind the toy to trigger a reaction in which Larry slowly approaches Sean (making a hissing sound) and eventually coming close enough to alarm Sean, causing him to “jump”.
The toy should be almost entirely made of plastic. Since it is essentially a hollow box with some small mechanical components inside, it may not be too durable.