Lavatory vs Labratory

It was my very, very first day of school. I imagined that school would be a magical and exciting place. As my kindergarten teacher handed me the big wooden pass with the tiny chain looped through it, she whispered that it was my turn to go to the lavatory. Wow ..... so many new things to see in school. School was sooo great. I was going to get to see a lavatory.....and on my very first day. Wow ! So, imagine my disappointment when I walked into the lavatory expecting to see a laboratory equipped with cool test tubes, bubbling beakers and some mad scientist equipment ... but saw, instead,
a BATHROOM ! Open Latte ..........