There is a GREEN gate on the podium at Britian Bank that leads to Santa's Quest area. Simply click Santa once to receive your quest book.
When doing this quest tame ONE reindeer at a time then return it to Santa and simply say "Santa" and click the reindeer and go find the next reindeer and repeat. Once all reindeer's have been brought to Santa ONE at a time you will see a huge hammer in your bag. Double click that hammer and a blue looking reindeer will pop up in your bag, drag the reindeer onto Santa and receive your prize!
This quest can be done multiple times!
Please have fun and enjoy the quest and FOLLOW ALL RULES!