Shoot, take the kid to a showcase and let him rip. He’ll face plenty of college recruits there and when he does well he’ll get offers right away. All he has to do is show up. That’s what my kids both did. You really don’t need advice here; we can’t sign him. But I bet there are thirty coaches at Headfirst or a similar showcase who’d love to watch him pitch. You will need to let them know you’re coming though.
In the email you tell the college coaches you’re coming don’t forget to provide his LL velocity with the MLB equivalent.
I do have a very important qualifying question. Did your grandson make the Little League all star team?