Recently I bought my son this toy in a Museum gift shop hoping it would help with his catching a baseball. He's 3.
After about 5 minutes of watching him play with it, ideas started flowing with possibilities.
Catchers receiving, framing, blocking.
Infielder hops, backhands
First baseman hops
And the list goes on.
Always keep an open mind to things around you. Tools that's don't have baseball on it or cost a ridiculous amount of money usual are just if not more effective at development.
This toy cost $5 dollars and should be in every ball bag.
Know the Why