and thank you everyone for your replies.
The First Line of Defense Against Germs
Think about all of the things that you touched today - from the telephone to the toilet. Maybe you blew your nose and played with your dog. Whatever you did, you came into contact with germs. So it's easy for germs on your hand to end up in your mouth (maybe when you scarfed that handful of popcorn with your teammates right after soccer practice).
By frequently washing your hands the right way, you'll wash away germs - such as bacteria and viruses - that you have picked up from other people, through contaminated water and food, from tainted surfaces, or from animals and animal waste.
http://www.kidshealth.org/teen/your_body/skin_stuff/handwashing.html
Even these little hands need to be washed. She is using flowers that have been picked by many hands, placed into a basket.