You can start this mission by talking to Claptrap in Sanctuary any time after completing "Bright Lights, Flying City". This mission will have you handing out party invites and getting down with Claptrap for his seventh birthday!
- XP: 1305
- Money: $275
- Gear: Choice of Pistol or Assault Rifle
Talk to Claptrap in Sanctuary to get started. He will send you around to hand invites to the big names in town. Drop off an invite with Scooter, Moxxxi, and Marcus and then head back to Claptrap.
Claptrap will ask you to activate the nearby Boom Box on the book shelf to get this party started. This will start the party. Hang out with Claptrap for a little over two minutes and do the things he asks of you to move the party along (the timer will stop until you do them). The things include eating pizza and blowing into the party favors.
After the timer runs out, talk to Claptrap to collect your reward.