Take your orphan into the battlegrounds and complete the feats listed below. This may also be a good time to grab the One An Orphan achievement!

Assault a tower in Alterac Valley

Simple enough. If you are Horde you can assault Stonehearth Bunker, Icewing Bunker, Dun Buldar North Bunker, or Dun Buldar South Bunker. Alliance can assault Iceblood Tower, Tower Point, West Frostwolf Tower, or East Frostwolf Tower. Happy capping!

Assault a flag in Arathi Basin

There are 5 locations in Arathi Basin you can assault:

Capture the flag in Eye of the Storm

All you have to do is run the flag in Eye of the Storm. The flag is located in the center of the Battleground.

Return a fallen flag in Warsong Gulch

Find the enemy flag carrier and kill them. Click on the flag and voila!