Four 12-minutes films were produced from four of the This is books: This is New York, This is Venice, This is Israel and This is Ireland. All four films were produced by Weston Woods, (now part of Scholastic) who are and were world leaders in the animation of children's books.

You can see an old recording of This is Israel here:

This is Israel (1963)

Part 1

Part 2. From oldlibraryfilms on Youtube.

Credits

Narration......................................................Gila Almagce
Music...................................................George Kleinsinger
Photography..............................................Edward English
Produced by....................................................Sonny Fox
                 ............................................Morton Schindel

About the films and Weston Woods

The Sasek films are created using Weston Woods "Iconographic" method, which means that they filmed from the still images to create the illusion of animation:

ICONOGRAPHIC: When Morton Schindel first started making motion pictures, he realized that it would take a special filming technique to faithfully transfer the artwork in picture books from page to screen. Since there was not a suitable method, he developed one. In the ICONOGRAPHIC technique the camera creates an "illusion of movement" by carefully panning and zooming over the actual illustrations from the book. Whenever possible the artist's original illustrations are used, although in most instances the illustrations must be adapted from copies of the book. This technique, first developed at Weston Woods, is now used by film producers everywhere.

From Weston Woods FAQ

This is Venice (1961)

This short film uses stills from This is Venice with narration from "Giuseppe" who tells the viewer about life in Venice. The pictures are all taken from the book, but the narration is different and told from a child's point of view. Music from Loren Glickman (founder of the Glickman-Popkin Bassoon Camp) really compliments the illustrations and makes the trip through Venice a delightful experience.

Credits

Narration ...........................................Dennis Bell Ballabio
Music......................................................Loren Glickman
Photography.....................................William D. Stoneback
Production staff........................................Edward English
                      .........................................John Cradock
                      ......................................Virginia Shippey
Produced by..................................................Sonny Fox
                 ...........................................Morton Schindel

Details for This is Ireland and This is New York are unknown.