Very cute Pre-Primers, 3rd editions and very popular reading series.  Harder to find, and more so in a set of two.  By Paul McKee, M. Lucile Harrison, Annie McCowen, Elizabeth Lehr, and William Durr.  Illustrated by Corinne Malvern. The Reading for Meaning Series

An adorable vintage pre-primer book set about Tip and Mitten, with Jack and Janet. Very popular Pre-Primers. Scarce