Brick Science’s latest build is an automatic toothbrush tricked out with accessories that shoot mouthwash and launch plaque-disclosing tablets. When challenged to make a robotic LEGO toothbrush, ...

“You have pink teeth!” someone said with a giggle. We grinned at each other to show off our rosy-colored teeth. We were elementary school students using “disclosing tablets.” Most of us had teeth the ...