Blonde jokes

A group of blondes walks into a bar, all excited and giggling. They order a round of drinks. One of the blondes raises her glass and shouts excitedly, "51!! " "51!! " The other blondes echo. After they have finished their drinks, another round is ordered. Again, the blondes toast "51". This happens a few times. Finally, the bartender speaks up. "Excuse me," He says, "But why do you ladies keep doing that? " "Well," Says one of the blondes, very bubbly, "We got a puzzle, right? And it said 2-4 years on the box. We finished it in 51 days!!!!! "