1960's Poster Art

Do these look vaguely familiar...almost dejavu-ish? This work was created by the artist team known as "Lefor Openo". They were a team of 2 ladies in the late 50's-60's who created advertisements in France. There is something naive and appealing about their work. They drew like educated children, in my opinion. I hope to be inspired by these and incorporate their style into my work.