Never be afraid to dodge the sensitive issues.
The Bobblehead - Agility is a Fallout 3 item, a Vault Boy bobblehead. It permanently raises the Lone Wanderer's Agility by 1, up to a maximum of 10.
It's found in the Greener Pastures Disposal Site's main office on a desk, next to a computer terminal.
The bobblehead in the shack, next to a terminal