The propaganda and informational posters in the Soviet state were a popular form of art and targeted different slices of society. You come to a factory where workers work and see the "Don't steal from the factory!" or "Be careful with machinery!" posters around.
You go out on the streets - you see different sorts of posters. Then when you enter a school for kids you get to see posters too, now these ones are targeted towards children. So what did kids have to know according to the propaganda masters of the State? Here is what:
"Every boy should know
Playing on the street is dangerous!"
"Become a worthy son of your Motherland"
"Help the smaller ones without asking questions!"