Sign up for an Award
Participate with your entry in one of our professional or student awards.Sign up for an award
You are using an outdated browser. Please upgrade your browser to improve your experience.
Kids don’t know if they wash their hands thoroughly.This is a kind of colorful sanitizer. It can tell you the unclean place you ignored clearly. And also take few water to waste.
Xue Mengru,Zhao Xiaoliang,Guo Yuanyuan,Zhang Litao