Folding children’s train book, published 1955-1963.
Size about 4″ x 6″ folded up accordion-style with flap on top.
Each book panel is a different kind of train car with a pocket containing a small booklet with a story, puzzles or games.
Final panels contained coloring paper & box of crayons.
This might be the Crayola Color ‘N’ Draw Fold-A-Book The Train and Circus Parade, which included easy-off crayons and pages that could be wiped clean for re-coloring.