Parenting Counts is a product of Talaris Institute.

Learning

Capable of Completing Puzzles with Three or Four Pieces (26-36 Months)

By the end of their second year, toddlers begin to understand the relationship between objects, solve simple jigsaw puzzles, and match similar shapes.

References:

Shelov, S. P. (Editor-in-Chief). (2004). Caring for Your Baby and Young Child: Birth to Age 5. The American Association of Pediatrics. Revised edition. New York: Bantam Books.