[Arkan]

Hey kid, you're going about it the wrong way! What you need to do is shower your grampa with love and tell him you love sharing quality time with him and the cars. He'll be estatic and he'll put all those cars in his will for you!!
As far as your uncle, don't worry about him. Grandfathers love grandchildren better anyway so the uncle isn't even in the running.

Save the killing for someone else who deserves it.