In the great green lab There was a laser And a lab notebook And a picture of Einstein with a stern look It's been a long day at the lab for this scientist. Now it's time to say good night! Goodnight laser Goodnight notebook Goodnight picture of Einstein with a stern look While poking fun at the clutter and chaos of lab life, scientists of all ages will appreciate ending their day with this sweet parody. They'll be rested and ready to return to the world of research in the morning!